Answer: option B. a car driving on a straight freeway at 60 miles.
Explanation:
A balance forces are said to act on an object when net force on an object is zero and the object is either at rest or moves with constant speed without changing direction.
In option A, C, and D the objects are changing direction during their motion. In option B, a car moves on a straight freeway in a single direction at constant speed of 60 miles per hour. Hence, the correct demonstration of balanced forces is by option B.
the answer is the car on the highway of your doing study island
A street ball whose mass is 2.0 kg is rolling at a rate of 2.8 m/so what is its momentum
Given that
mass of ball ( m) = 2 Kg,
velocity (v) = 2.8 m/s ,
Momentum of ball = ?
We know that "Momentum is simply means, mass in motion
Mathematically,
momentum (p) = m.v
= 2× 2.8
= 5.6 Kg.m/s
=
What are two places in your body where you find smooth muscles
Some places where you can find smooth muscles in your body are,
the walls of your blood vessels,
the walls of your stomach,
the intestines,
and the iris of your eye.
those are just some.
if you need different ones, I have more.
hope i could help!Valcanos can have effect on the
When volcanoes erupt, they emit a mixture of gases and particles into the air. Some of them, such as ash and sulphur dioxide, have a cooling effect, because they (or the substances they cause) reflect sunlight away from the earth. Others, such as CO2, cause warming by adding to the the greenhouse effect.
Volcanoes can have long-term effects on the climate, making the world cooler.
Hope this helps☺
Amy has a mass of 30 kg, and she is riding a scateboard traveling 5 m/s. what is her momentum?
Answer:
Momentum (p) = m . v Kg-m/s
= 30 × 5
p = 150 Kg .m/s
an object of mass 4 kg is placed on an inclined plane at an angle of 60. if the object slides down the plane with an acceleration of 3m/s, what is the coefficient of the kinetic friction
The forces on the y axis are:
N-mgcos(60)=0 , wich becomes
N=mgcos(60)
Rember that the friction force is always contrary to the motion of an object and its formula is f=μ * N
The forces in the x axis are:
-f + mgsin(60)= m * a
-μ*mgcos(60) + mgsin(60)=m*a ,
μ = ( m*a - mgf=μ[sin(60) )/ ( mgcos(90) )
If you were to apply a force of 15N to a medicine ball with a mass of 5kg, what would its acceleration be
Given that
Force (F) = 15 N ,
mass (m) = 5 Kg ,
acceleartion = ?
We know that, From Newtons II law
F = m. a
15 = 5 × a
a = 15÷ 5
a = 3 m/s²
acceleration of the ball is 3 m/s²
If you are pushing on a door trying to make it slide open if your friend stands behind you and helps you push how hase the forces changed
Answer
The net force applied will increase
Explanation
According to Newton’s second law , force is the product of mass and acceleration. In this case, when a friend joins in the pushing of the door, the total net force applied on the door increases and the door will open with much ease. Force=mass × acceleration,
F=m × a
Answer:
The force will change as the net force applied will increase.
Explanation:
If you are pushing on a door really hard, trying to make it slide open and if your friend is also stand behind you and contributes to help you push towards the door, then the overall force will change as the net amount of force applied will increase.
This is an example of Newton's second law according to which you need more force to move an object with heavier mass.
F = ma
Therefore, the force applied by you and your friend will add and the net force applied will be increased.
Which experiment would be BEST to investigate the effects of wavelength on diffraction patterns?
A) Send pulses down a slinky at a variety of wavelengths and measure the reflected amplitudes.
B) Strike tuning forks of various frequencies and observe the beat frequencies that are created.
C) Shine lasers of various colors at a narrow slit in an index card and measure the distance between the bright spots.
D) Emit sound waves from a car moving at a variety of speeds and listen to the pitch of the sound as it moves towards and past.
Answer:
Shine lasers of various colors at a narrow slit in an index card and measure the distance between the bright spots.
Explanation:
When the light passes through the narrow opening or the obstacles, it bends. This process is called the diffraction of light. The experiment to investigate the wavelength on the diffraction pattern is " to find the wavelength of laser light with the help of diffraction process ".
In this experiment, a laser light, a slit and the detector is placed on the optical bench. Then the laser light is passes on the slit and diffraction pattern can be seen in the screen.
So, the correct option that shows the best experiment to investigate the wavelength on the diffraction pattern is " Shine lasers of various colors at a narrow slit in an index card and measure the distance between the bright spots ".
An aircraft carrier runway is about 400 m long. The speed of a standard fighter jet is approximately 641 m/s. Assuming a constant acceleration, if a jet fighter is landing on an aircraft carrier at that speed, how long does it have to slow down to a stop before it falls off the runway?
In this question we have given
length of runway=400m
speed of jet=641m/s
we have to find time to cover 400m distance
we know that
[tex]time=distance/Velocity\\therefore\\Time=400/641\\=.624S[/tex]
if jet fighter is landing on an aircraft carrier at speed of 641m/s then it will have .624S to slow down to a stop before it falls off the runway
The time taken by the aircraft to come to rest on the runway is [tex]\boxed{1.25\text{ s}}[/tex].
Explanation:
Given:
The initial speed of the aircraft on the runway is [tex]641\text{ m/s}[/tex].
The final speed of the aircraft on runway is [tex]0\text{ m/s}[/tex].
The distance covered by the aircraft on runway is [tex]400\text{ m}[/tex].
Concept:
The aircraft moves on the runway and comes to rest under the constant acceleration during its motion. In this case, the acceleration acts in the opposite direction of the motion of aircraft.
The average velocity of a body that has constant acceleration during the motion is defined as the mean of the initial and the final velocity of the body.
Write the expression for the average velocity of the aircraft.
[tex]\boxed{v_{avg}=\dfrac{v_{f}+v_{i}}{2}}[/tex]
Substitute the values of initial and final velocity of the aircraft in above expression.
[tex]\begin{aligned}v_{avg}&=\dfrac{0+641}{2}\\&=320.5\text{ m/s}\end{aligned}[/tex]
The time taken by the aircraft to come to rest can be calculated as the ratio of the distance covered to the average speed of the aircraft.
Write the expression for the time taken by aircraft.
[tex]\boxed{T=\dfrac{v_{avg}}{d}}[/tex]
Substitute the values of distance and the average velocity of the aircraft.
[tex]\begin{aligned}T&=\dfrac{400\text{ m}}{320.5\text{ m/s}}\\&=1.248\text{ s}\end{aligned}[/tex]
Thus, the time taken by the aircraft to come to rest on the runway is [tex]\boxed{1.25\text{ s}}[/tex].
Learn More:
1. The average speed of the car in the entire trip is https://brainly.com/question/504792
2. The effect of change in radius on the angular velocity https://brainly.com/question/5813257
3. The distance at which the tennis ball falls after being hit https://brainly.com/question/2843859
Answer Details:
Grade: High School
Subject: Physics
Chapter: Motion in one dimension
Keywords:
Aircraft carrier, runway, fighter jet, initial speed, landing, comes to rest, acceleration, average velocity, constant, distance, time.
At what point on the hill with the car have zero gravitational potential energy
A) halfway down the hill
B) at the top of the hill
C)at the bottom of the hill
D) it will never have zero gravitational potential energy
Gravitational potential energy of the car is given by formula
[tex]U = mgh[/tex]
here m = mass of the car
g = gravitational field intensity
h = height of the car from reference point
so here from above formula we can say that if height of the car from reference is zero the gravitational potential energy will be zero
So here we generally took the reference point to be at bottom on the ground
so here also the gravitational potential energy will be zero at the ground
so correct answer will be
C)at the bottom of the hill
Answer:
C) up a hill and then rolling back down the other side.
Explanation:
If a bicyclist is traveling 60 kilometers in two hours her average speed is?
Her average speed would be 30 kilometers in a hour.
Answer: Her average speed would be 30 kilometers per hour because 60 divided by two is 30 which is how you can calculate the average speed if desired.
Hope this helps! :)
Explanation:
Help with the two questions above? Correct answers?
(6) first choice: the frequency appears higher and wavelength is shorter.
The car approaches a stationary observer and so the sound will appear to have shorter wavelength. This creates an effect of its siren to sound with higher frequency than it would do if both were stationary.
(7) The Doppler formula for frequency in the case of a stationary observer and source approaching it is as follows:
[tex]f_O = \frac{v}{v-v_s}\cdot f= \frac{343\frac{m}{s}}{(343-25)\frac{m}{s}}\cdot 400Hz \approx 431Hz[/tex]
The wavelength is then
[tex]\lambda = \frac{343\frac{m}{s}}{431Hz}\approx 0.80 m[/tex]
The third choice "0.80m; 431Hz" is correct
What's is the difference between the way Aristotle and Galileo studied nature?
Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.Thus, Aristotle believed that the laws governing the motion of the heavens were a different set of laws than those that governed motion on the earth. As we have seen, Galileo's concept of inertia was quite contrary to Aristotle's ideas of motion: in Galileo's dynamics the arrow (with very small frictional forces) continued to fly through the air because of the law of inertia, while a block of wood on a table stopped sliding once the applied force was removed because of frictional forces that Aristotle had failed to analyze correctly.
Galileo Galilei's mind opens to physics, and nature controls laws that can be mathematically formulated and written in Sagiatori in 1623:
"There is a philosophy in this great book, the book of the universe, which is always open to us, but we can not understand the book if we do not know the language in which it was written and we do not try to learn the letters ... One can not understand even one word of nature and the universe, Human in a large dark lobby ".
2 - Aristotle believed that the nature of the "first engine" eternal is the source of the infinite movement, and that it is valid and exist outside the universe.
Aristotle is one of the ancient Greek scientists who worked on the interpretation of nature based on their competence in observation, reasoning and reasoning, starting with what they considered truthful facts and analyzing them carefully, believing that this would lead them to the correct conclusions.
By following this philosophy, they undoubtedly reached a number of sound conclusions, including that the universe was governed by a particular system, but there was a fundamental weakness in their philosophy, and their ability to observe was limited because they relied only on their abstract senses. . Many scientists, including Aristotle, for example, thought that planets and stars revolve around Earth, an idea that was then self-evident, and Charles Freeman, in his book "Closing Western Thought." Earth is the center of the universe. "
The brakes on a truck fail as it approaches a car stopped at a red light. Use Newton’s first and second law of motion to explain what will happen when the truck collided with the car.
Answer:
The truck will hit the car at rest, causing the car at rest to have an initial velocity of the velocity of the truck right before it hits it, then after the truck hits the car, there will be an equal and opposite force, so that is what causes the cars to accordion, because the force that the truck exerts on the car at rest will also be exerted on the truck.
Explanation:
Since Newton's first law says an object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an external force, we know that the external force is the truck and that will cause the car at rest to move.
When a moving truck collided with the car, according to Newton's first law, the inertia of both of the car and truck is be changed and According to Newton's second law, the smaller mass in between the truck and the car experiences greater change in velocity.
What is Newton’s first and second law of motion?According to Newton's First Law, a body in uniform motion or at rest will remain in that state up to and unless a net external force acts on it.
According to Newton's second law, an object's acceleration caused by a net force is directly proportional to the force's magnitude, moving in the same direction as the force, and inversely proportional to the mass of the object.
According to Newton's First Law, when the truck collided with the car, an external, unbalanced force operates on both the truck and the vehicle in a collision with a truck, causing the truck to suddenly slow down to rest and accelerate from rest. In case they are belted up, the other occupants in the vehicle are similarly propelled forward from a stop. You will be moving along with the car when you are securely fastened to it.
According to Newton's second law, the impact of force will be grater for smaller mass, that is, the smaller mass in between the truck and the car experiences greater change in velocity.
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Which statement best describes the motion of a mass on a spring
Answer:
Motion of mass on a spring can be described as "simple harmonic motion (SHM)". Oscillatory motion that follows Hook's law.A 9.00 kg mass is moving to the right with a velocity of 14.0 m/s. A 12.0kg mass is moving to the left with a velocity of 5.00 m/s. Assuming that these two balls have a head on collision and stick together, what will be the final velocity of the combination?
Answer:
3.143 m/s
Explanation:
m1 = 9 kg
u1 = 14 m/s
m2 = 12 kg
u2 = - 5 m/s
Let the velocity after the collision is V
By using the principle of conservation of momentum
Momentum of two bodies before collision = momentum of two bodies after collision
m1 x u1 + m2 x u2 = (m1 + m2) x V
9 x 14 - 12 x 5 = (9 + 12) x V
126 - 60 = 21 x V
V = 3.143 m/s
Thus, the velocity of the sticked bodies after the collision is given by 3.143 m/s.
To find the final velocity of two colliding masses sticking together, use the conservation of momentum equation. The total momentum before collision equals total momentum after collision, yielding a final velocity of 3.14 m/s to the right.
To find the final velocity of the combination of the two masses after the collision, we can use the principle of conservation of momentum. The total momentum before the collision is equal to the total momentum after the collision.
Step-by-Step Solution:
Determine the initial momenta of each mass:
Momentum of the 9.00 kg mass:
p₁ = m₁v₁
p₁ = 9.00 kg × 14.0 m/s
p₁ = 126 kg·m/s (to the right)
Momentum of the 12.0 kg mass:
p₂ = m₂v₂
p₂ = 12.0 kg × (-5.00 m/s)
p₂ = -60 kg·m/s (to the left)
Add the momenta to find the total initial momentum:
[tex]p_{total[/tex] = p₁ + p₂
[tex]p_{total[/tex] = 126 kg·m/s - 60 kg·m/s
[tex]p_{total[/tex] = 66 kg·m/s
Calculate the total mass after the collision:
[tex]m_{total[/tex] = m₁ + m₂
[tex]m_{total[/tex] = 9.00 kg + 12.0 kg
[tex]m_{total[/tex] = 21.0 kg
Using the conservation of momentum, the combined mass's final velocity (vf) is given by:
[tex]v_f[/tex] = [tex]p_{total[/tex] / [tex]m_{total[/tex]
[tex]v_f[/tex] = 66 kg·m/s / 21.0 kg
[tex]v_f[/tex] = 3.14 m/s
Therefore, the final velocity of the combination after the collision is 3.14 m/s to the right.
what describes why ocean currents are considered convection currents
Convection occurs because the oceanic waters heat up becoming less dense. This water moves above the cooler water, and give off its heat to the surrounding environment. As it cools, it begins to sink, and the process begins again.
The correct answer is Option B.
Explanation: When a fluid is heated unevenly, it starts moving in convection cells, carrying thermal energy from its warmer parts to its colder parts. Such motion due to temperature differences is called a convection current. Ocean currents may be considered convection currents because warm water rises and cold water moves in to replace it. Warm currents carry thermal energy from warmer regions near the equator toward the poles. Cold currents move toward the equator, making the temperature there lower than it would be otherwise.
a truck drives up a hill with a 15 incline. if the truck has a constant speed of 22m/s, what are the horizontal and vertical components of the trucks velocity
Answer:
speed of truck (v) = 22 m/s ,
angle of hill (Θ) =15°
Find
Vertical component (Fv) = ?
Harizontal component (Fh) =?
Vertical component (Fh) = V cosΘ
= 22. cos 15
= 21.25 m/s.
Harizontal component (Fv) = V sinΘ
= 22. sin 15
= 5.69 m/s.
a. The horizontal component of the truck's velocity is 5.69 m/s.
b. The vertical component of the truck's velocity is 21.25 m/s.
Given the following data:
Angle of inclination = 15°Velocity of truck= 22 m/sTo find both the horizontal and vertical components of the truck's velocity:
a. To find the horizontal component of the truck's velocity:
Mathematically, the horizontal component of velocity is given by the formula:
[tex]V_y = Vsin(\theta)\\\\V_y = 22sin(15)\\\\V_y = 22 \times 0.2588[/tex]
Horizontal component, Vy = 5.69 m/s
b. To find the vertical component of the truck's velocity:
Mathematically, the vertical component of velocity is given by the formula:
[tex]V_x = Vcos(\theta)\\\\V_x = 22sin(15)\\\\V_x = 22 \times 0.9659[/tex]
Vertical component, Vx = 21.25 m/s
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During a test, what can a student use to identify what type and how many atoms are in a chemical compound?
common names
chemical names
the International Union of Pure and Applied Chemistry
the National Chemistry Society
The correct tool a student can use to identify what type and how many atoms are in a chemical compound is the International Union of Pure and Applied Chemistry (IUPAC) nomenclature.
The IUPAC nomenclature is a systematic method of naming chemical compounds based on their molecular structure. It provides a standardized way to communicate information about the composition and structure of molecules, including the types of atoms present and their arrangement. By using IUPAC names, one can deduce the molecular formula, which indicates the number and type of atoms in the compound.
For example, the IUPAC name for the compound ethanol is ethyl alcohol. From this name, we can determine that the compound contains two carbon atoms (eth- indicates an ethyl group, C2H5), one oxygen atom (the suffix -ol indicates an alcohol group, -OH), and six hydrogen atoms (since the ethyl group has five hydrogen atoms and the alcohol group has one). Thus, the molecular formula for ethanol is C2H6O, which accurately represents the number and type of atoms in the compound.
Common names and chemical names provided by societies like the National Chemistry Society can sometimes be used to identify compounds, but they may not always provide clear information about the molecular structure or the exact number of each type of atom. These names can be ambiguous or vary by region and language, whereas IUPAC nomenclature is internationally recognized and provides a clear and unambiguous description of the compound's composition.
Therefore, the IUPAC nomenclature is the most reliable tool for a student to use during a test to determine the type and number of atoms in a chemical compound.
A 15W fluorescent light bulb uses operates for 30 minutes and produces 20kJ of light energy, what is the percent efficiency of the light bulb? Show work.
Given that ;
Energy (work ) Produced by bulb =20 KJ = 20000 J
Input power = 15 KW
Output power given by the bulb = Rate of doing work
= Work ÷ time
= 20000 ÷ 1800 (since 1 min = 60 seconds)
= 11.11 W
Noe, efficiency is the ratio of output power to input power
η = output power ÷ input power
= 11.11 ÷ 15
= 0.74
= 74%
Efficiency of light bulb is 74%
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Dave throws a tennis ball straight up into the air he throws the ball with mass of 0.07 kg A speed of 28 m/s and there is no air resistance how high does the ball A speed of 28 m/s and there’s no air resistance how high does the ball go
Dave's ball, with a mass of 0.07 kg thrown at 28 m/s, reaches a maximum height of approximately 40 meters. This is calculated using the conservation of energy principle, equating the initial kinetic energy to the potential energy at the ball's highest point.
Explanation:To determine how high the ball goes when Dave throws it straight up into the air, we can use the principles of physics and the conservation of energy. Given that the ball has a mass of 0.07 kg and is thrown at a speed of 28 m/s, we ignore the air resistance as per the question's instruction. The maximum height (h) reached by the ball can be calculated using the equation derived from conservation of mechanical energy: the kinetic energy at the point of release equals the potential energy at the highest point.
The kinetic energy (KE) when the ball is thrown is KE = (1/2)mv^2, where m is the mass and v is the initial velocity. The potential energy (PE) at the highest point is PE = mgh, where g is the acceleration due to gravity (approximately 9.81 m/s^2) and h is the height. When the ball reaches its highest point, its velocity is 0 m/s, so its kinetic energy is also 0, and all the initial kinetic energy has been transferred to potential energy. Therefore, (1/2)mv^2 = mgh.
Solving for h gives us h = (1/2) * (v^2 / g). Plugging in the values, we get h = (1/2) * (28^2 / 9.81) which equals to approximately 40 meters. So, the ball thrown by Dave reaches a height of roughly 40 meters.
Eric, Sheena, and Yael are playing a game. Eric has half as many points as Sheena. Sheena has two fewer points than Yael. Together, the three players have 52 points. How many points does Yael have?
Show the work plssss... Thank you
Lets say that:
Eric is E
Sheena is S
Yael is Y
We know that S+2=Y, E= 1/S and that E+S+Y=52. So, we can insert S+2=Y and E= 1/S into our other equation, which would bring us to (1/2S)+(S+2)+S=52. This is equal to 1/2S+S+2+S=52. We then use algebra to get the answer:
Given:
S+2=Y
E=1/S
E+Y+S=52
Equation:
1/2S+S+2+S=52
1/2S+S+S=52
2.5S=50
S=50/2.5
S=20
And since Yael has 2 more points then Yael then we do 20+2 and get 22.
Hope this helps! <3
Im stressing out about this cause obviously i thought i did good but i guess not can someone explain to me where i went wrong this is her feedback
Comments: Mia,
I am happy to see you are jumping right into the course. You are correct that physics and Newton's laws of motion are important to swimming. You are off to a good start, but you have not mastered the 3 laws of motion, yet. I would like you review the definitions and examples in the lesson and to then download the worksheet and complete the questions directly on the sheet. It will guide you to write in Newton's 3 Laws of motion and provide examples. If you need any help please reach out to me. With some more hard work, I know you can do this. I am excited to see what your resubmit.
I would recommend, to include the scientific part of Newton's Laws of motion, with an example. Also, state how all three laws play a part in the activity. It seems like you just did the realistic part of it, swimming, now include how it happens with correct vocabulary. Good Luck!
A pendulum swings back and forth and has a kinetic energy of 400 j at a particular point in its path. Which of the following is not true
A- both the kinetic and potential energy are decreasing
B- the minimum kinetic energy is zero
C- when the kinetic energy is zero, the potential energy will be 400 J
D- the potential energy increases when the kinetic energy decreases
A pendulum swings performing back and forth motion and having a kinetic energy of 400 J then both the kinetic and potential energy are decreasing. Hence, option A is correct.
What is Kinetic energy?The energy that an object has as a function of motion is known as kinetic energy. It is described as the effort required to move a surplus body from rest to the indicated velocity. The body will hold onto the kinetic energy it acquired during its acceleration until its speed changes.
The body exerts the same amount of effort when slowing from its current pace to a condition at rest. Formally, angular momentum is any term in the Lagrangian of a system having a time derivative. Mathematically, it is represented as [tex]\frac{1}{2} mv^2[/tex].
Therefore, both the kinetic and potential energy is decreasing, so option A is correct.
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Final answer:
The statement that is not true is 'both the kinetic and potential energy are decreasing,' as this violates the conservation of energy in a swinging pendulum. Energy is transferred from potential to kinetic and vice versa, not decreased simultaneously.
Explanation:
The question relates to the conservation of energy in a swinging pendulum, a common topic in high school physics. Specifically, it concerns the relationship between kinetic energy and potential energy during the pendulum's motion.
When a pendulum swings back and forth, its kinetic energy and potential energy are constantly interchanged. At the highest points of the swing, where the pendulum momentarily stops before changing direction, the kinetic energy is zero and all energy is stored as potential energy. On the other hand, at the lowest point in its path, where the pendulum moves fastest, the potential energy is at its minimum and kinetic energy is at its maximum.
Given this information, let us examine the provided statements:
A- This statement is incorrect because, at a particular point, both energies cannot be decreasing at the same time since energy is being transferred from one form to the other.
B- This is true, as the kinetic energy is zero when the pendulum reaches its highest point.
C- When the pendulum's kinetic energy is zero at its highest point, the potential energy equals the total mechanical energy, which would be 400 J if no energy were lost to friction or air resistance.
D- This statement is correct as it follows the principle of energy conversion, where an increase in potential energy is matched by a corresponding decrease in kinetic energy and vice versa.
Therefore, the statement that is not true is A - both the kinetic and potential energy are decreasing. The potential energy increases when the pendulum reaches the highest points of its swing (where the kinetic energy decreases to zero), and the kinetic energy increases as the pendulum swings downward and potential energy decreases.
Where would the pauses be in the following sentence? The United States is, in many ways, a nation in love with statistics.
a.
after nation and love
c.
after States and with
b.
after is and ways
d.
none of the above.
Please select the best answer from the choices provided
A
B
C
D
The answer is b. after is and ways. You always pause after a comma before moving on to the rest of the sentence.
Answer:
Explanation:
It's none of the above. The sentence is complete the way it stands. There is no need for any more punctuation.
So the answer is D.
imagine that two balls, a basketball and a much larger exercise ball, are dropped from a parking garage. If both the mass and radius of the exercise ball are 3 times larger than the mass and radius of the basketball, which of the two balls do you think will reach the ground first? Make a hypothesis below and describe your reasoning.
Hypothesis
Let there is no air drag or any other resistance force due to surrounding
Now the force equation of ball is given as
[tex]F = mg[/tex]
[tex]ma = mg[/tex]
[tex]a = g[/tex]
so the ball will be dropped down by acceleration a = g and this acceleration is independent of size and mass of the ball
So in this case both balls will be dropped by same acceleration.
So here both balls will hit the ground at same time
Final answer:
The hypothesis is that the basketball will reach the ground first due to its lower air resistance compared to the larger exercise ball.
Explanation:
Hypothesis: The basketball will reach the ground first.
Reasoning: When objects fall, they accelerate at the same rate due to gravity, regardless of their mass. The air resistance acting on the larger exercise ball will be greater due to its larger size, causing it to fall slightly slower than the smaller basketball.
Example: Consider dropping a feather (light but has air resistance) and a coin (heavier but less air resistance) simultaneously from the same height, and you'll notice the feather takes longer to reach the ground.
What is a benefit of fossil fuel consumption?
A. Renewable resource
B. Cheap energy
C. Low pollution
D. Increased greenhouse gages
The Benefit of Fossil Fuel Consumption among the Given Options is :
B. Cheap Energy
Because :
✿ Fossil Fuels are Non - Renewable.
✿ They result in High Pollution and Greenhouse Gases.
A benefit of fossil fuel consumption is B. Cheap energy.
Fossil fuels, such as coal and natural gas, are widely available and can generate electricity at a relatively low cost. Despite their environmental drawbacks, including high carbon emissions and pollution, the existing infrastructure and technological development around fossil fuels make them an inexpensive energy source.
Putting effort at point IV of this lever offers no mechanical advantage because itA)requires a smaller distance
B)requires a greater distanceC)requires a greater forceD)requires a smaller force
Putting effort at point IV of this lever gives no mechanical advantage because it requires a greater force. So the correct answer is C).
Answer:
c
Explanation:
According to Newton’s first law of motion, what must happen to move an object at rest?
Answer:
According to Newton’s first law of motion, a force must act on it to move an object at rest.
Explanation:
According to the Newton's first law of motion, for an object to change its velocity (either a change in the magnitude or the direction), there must be a cause to it which is defined as a net external force.
So for an object to move from rest, an external force must be applied to it.
Final answer:
According to Newton's first law of motion, to move an object at rest, a net external force must be applied. This law, also known as the law of inertia, indicates that an object will not change its state of motion without the influence of an external force. This demonstrates the connection between motion and forces.
Explanation:
According to Newton’s first law of motion, for an object at rest to move, it must be acted upon by a net external force. This law, also known as the law of inertia, explains that without such a force, an object will remain in its current state, whether that is at rest or in motion at a constant velocity. The crucial point is that any change in motion - initiating movement from rest, altering speed, or changing direction - requires the influence of a net external force. This force could be anything from a push or pull, to gravity or friction acting on the object.
The common observation that objects naturally tend to slow down and come to a halt is not due to inertia but rather the result of frictional or other forces acting against the object’s motion. Therefore, to move an object at rest, a force must be applied that is greater than the resisting forces, such as friction. This illustrates the fundamental nature of motion and forces as described by Newton’s first law.
hich are made of matter? Check all that apply. air bicycles sound waves people clothes sunlight trees
I believe that air, bicycles, people, clothes and trees are matter however sound waves and sunlight are not. :)
Answer:
air, bicycles, people, clothes, trees
Explanation: