Physics
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
Related Questions
Give an example to show the conversion of potential energy to kinetic energy when put in use.
State the energy changes that occur in a watch spring while it unwinds.
The moon is revolving around the earth in a circular path. How much work is done by the moon?
Give reasons for the following:
No work is done if a man is pushing against a wall.