스크린샷 2022-03-30 오후 12.01.27 An external force F moves a 2.50-kg box at a constant speed v up a frictionless ramp, as shown in the figure. The force acts in a direction parallel to the ramp. 5.00 m 03. Calculate the work W done on the box by this force as it is pushed up the 5.00-m ramp to a height h = 3.00 m. 十 스크 -03. h W = 스크로 -0. How does the work done on the box compare to the change in gravitational potential energy AU, that the grav box undergoes as it rises to its final height? W > AU grav W < AU grav O W = AU grav

스크린샷 2022-03-30 오후 12.01.27 An external force F moves a 2.50-kg box at a constant speed v up a frictionless ramp, as shown in the figure. The force acts in a direction parallel to the ramp. 5.00 m 03. Calculate the work W done on the box by this force as it is pushed up the 5.00-m ramp to a height h = 3.00 m. 十 스크 -03. h W = 스크로 -0. How does the work done on the box compare to the change in gravitational potential energy AU, that the grav box undergoes as it rises to its final height? W > AU grav W < AU grav O W = AU grav

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Description: 스크린샷 2022-03-30 오후 12.01.27An external force F moves a 2.50-kg box at a constant speedv up a frictionless ramp, as shown in the figure. The force actsin a direction parallel to the ramp.5.00 m-03.Calculate the work W done on the box by this force as

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 29P: A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N...

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Similar questions

Calculate the power output needed for a 950-kg car to climb a 2.00 slope at a constant 30.0 m/s while encountering wind resistance and friction totaling 600 N.
A particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a frictional force also acts on the particle. If the particle’s speed when it starts at x=4.0 m is 0.0 m/s and when it arrives at x=4.0 m is 9.0 m/s, how much work is done on it by the frictional force between x=4.0 m and x=4.0 m?
A 5.0-kg box has an acceleration of 2.0m/s2 when it is pulled by a horizontal force across a surface with K=0.50 . Find the work done over a distance of 10 cm by (a) the horizontal force, (b) the frictional force, and (c) the net force. (d) What is the change in kinetic energy of the box?
A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?
A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.Oc below the horizontal. (a) What is the work done on the cart by friction? (b) What is the work done on the cart by the gravitational force? (c) What is the work done on the cart by the shopper? (d) Find the force the shopper exerts, using energy considerations. (e) What is the total work done on the cart?
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Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
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(a) What is the average useful power output of a person who does 6.00106J of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)