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Is the work required to be done by an external force on an object on a frictionless, horizontal surface to accelerate it from a speed v to a speed 2v

(a) equal to the work required to accelerate the object from v= 0 to v.

(b)  twice the work required to accelerate the object from v= 0 to v.

(c) three times the work required to accelerate the object from v= 0 to v.

(d) four times the work required to accelerate the object from v= 0 to v.

(e) not known without a knowledge of the acceleration.

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Anil Kumar G.
Anil Kumar G.Lv10
15 Dec 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

You push an object initially at rest across a frictionless floor with a constant force for a time interval , resulting in a final speed of v for the object. You then repeat the experiment, but with a force that is twice as large. What time interval is now required to reach the same final speed v?

(a)     

(b)  

(c)  

(d)  

(e)  

1. A block is placed on a plane whose angle of inclination is 30˚. The coefficients of static and kinetic friction for the block on the inclined plane are both 0.2. The block
(A) remains stationary on the inclined plane.
(B) accelerates down the inclined plane.
(C) travels down the inclined plane at a constant velocity.
(D) travels up the inclined plane at a constant velocity.
(E) accelerates up the inclined plane.

2. An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. The plane makes an angle of 30˚ with the horizontal and is 72 m long. The coefficient of friction between the plane and the object is 0.35. The speed of the object at the bottom of the plane is?

3. A 5-kg object slides down a frictionless surface inclined at an angle of 30˚ from the horizontal. The total distance moved by the object along the plane is 10 meters. The work done on the object by the normal force of the surface is?

4. A mass m = 2.5 kg is sliding along a frictionless table with initial speed v as shown in the figure. It strikes a coiled spring that has a force constant k = 500 N/m and
compresses it a distance x=5.0 cm. The initial speed v of the block was..?



5. The graph shows how the position of a particle depends on time. Which choice is closest to the instantaneous speed of the particle at t = 3s?
(A) 0.40 m/s
(B) 0.67 m/s
(C) 0.75 m/s
(D) 1.50 m/s
(E) 2.22 m/s



6. Calculate the work done by a force, F = 2x i, along the
path (0, 0) -> P1(2, 0) -> P2(2, 2).



A 0.25-kg object moves along astraight line. The net force acting on the object varies with theobject's displacement as shown in the graph below. The objectstarts from rest at displacement x = 0 and time t = 0 and isdisplaced a distance of 10 m. Determine each of thefollowing:

The amount of work done by the net force in displacing the objectthe first 5 m (W= 8J), the speed of the object at displacement x= 5m (v= 8.0m/s), the final speed of the object at displacement x= 10m, ?? the change in momentum of the object as it is displaced fromx= 5 m to x= 10 m, ?? and the impulse the object received duringthe total displacement ??.

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