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- 1. Multiple Choice
Work done upon a body is :
A vector quantity
A scalar quantity
Both A and B are correct
None of these
- 2. Multiple Choice
In tug of war work done by loosing team is :
Zero
Positive
Negative
None of these
- 3. Multiple Choice
A particle of mass m is at rest is acted upon by a force F for a time t. Its kinetic energy after an interval of t is :
F2t2/m
F2t2/2m
F2t2/3m
Ft/2m
- 4. Multiple Choice
One atomic mass unit (a.m.u) is equal to :
1 eV of energy
931 eV of energy
1 MeV of energy
931 MeV of energy
- 5. Multiple Choice
A device which converts the electrical energy into mechanical energy is called :
Dynamo
Electromagnet
Electric motor
Generator
- 6. Multiple Choice
In a simple pendulum mass of bob is 100 g and effective length is L. Work done on the pendulum in one complete oscillation by gravitational force is:
1/4 x mgL
1/2 x mgL
Zero
mgL
- 7. Multiple Choice
Energy possessed by a body by virtue of its motion is called :
Potential energy
Kinetic energy
Gravitational energy
None
- 8. Multiple Choice
A boy pushes a book kept on a table by applying a force of 4.5 N. find the work done by the force, if book is displaced through 30 cm along the direction of push
1.10 J
1.25 J
1.35 J
None
- 9. Multiple Choice
The kinetic energy of an object is K. If its velocity is doubled then its kinetic energy will be :
K
2K
K/2
4K
- 10. Multiple Choice
Ratio of potential energy of body A and body B will be :
2/3
3/2
1/3
3/4
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