Physics
When a ball m is thrown upwards to a height h, the work done by the force of gravity is:
- mgh
- -mgh
- mg
- mgh2
Related Questions
For work done to be maximum, the angle between the force and displacement should be :
- 0°
- 30°
- 45°
- 90°
When a body moves in a circular path in a horizontal plane, the work done is :
- Positive
- Negative
- Zero
- Maximum
The S.I. unit of work is:
- Joule
- erg
- Newton
- dyne
A coolie A takes 1 minute to lift a load to the roof of a bus whereas coolie B take 2 minutes to lift the same load to the roof of the same bus. The work done by B is:
- equal to work done by A
- greater than work done by A
- less than work done by A
- none of the above.