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1) The block below is pulled at a distance of 2.5 m. How much work is done by the force? 

2) What would be the work done if the force acts in a direction 30o above the horizontal?

3) Two objects of different mass start from rest, are pulled by the same magnitude net force and are moved through the same distance. The work done on object A is 500 J. After the force has pulled each object, Object A moves twice as fast as object B.Answer the following questions

  • I) How much work is done on object B
  • II) What is the kinetic energy of object A after being pulled?II) What is the kinetic energy of object A after being pulled?
  • IV) what is the ratio of the mass of object A to the mass of object B?

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Tauseef Shaikh
Tauseef ShaikhLv10
2 Feb 2021

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Related textbook solutions

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

Related questions

1. Can work be done on a system if there is no motion?

A) Yes, if an outside force is provided B) Yes, since motion is only relative C) No, since a system which is not moving has no energy D) No, because of the way work is defined 

2. The quantity 1/2 mv 2 is

 A) the power supplied to the object by the force  B) the work done on the object by the force  C) the kinetic energy of the object. D) the potential energy of the object.

3. If you push twice as hard against a stationary brick wall, the amount of work you do 

A) doubles. B) is cut in half  C) remains constant but non-zero  D) remains constant at zero 

4. If the net work done on an object is positive, then the object's kinetic energy 

A) increases. B) decreases  C) remains the same D) is zero

5 A force of 20 N moves an object in the direction of the force. The work done when the object moves from 2.0 to 4.0 m is o A) 20 J OB) 40 J oC) 60 J D) 80 J

A constant net force of 75 N acts on an object initially at rest asit moves through a parallel distance of 0.60 m.

What is the final kinetic energy of the object?

If the object has a mass of 0.20 kg, what is its final speed?

An object of mass 31 kilograms is on a smooth horizontal plane and a force of

124 Newtons is applied to the object in a horizontal direction (friction is zero).

The object is initially at rest. Calculate

(a) the acceleration of the object 

(b) the velocity of the object after 5 seconds 

(b) the kinetic energy of the object after it moves 14 metres.

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