Define gravitational unit of work done .

Define gravitational potential .Write down its CGS and SI units.

Define work.

Define gravitational constant. State its SI unit.

Define gravitational constant. State its S.I. unit.

Define intensity of a gravitational field. Write down its CGS and SI units.

A rain drop of radius R falls from a height of H metre above the ground. The work done by the gravitational force is proportional to which one of the following?

A rain drop of radius 2mm falls from a height of 250 m above the ground. What is the work done by the gravitational force on the drop ?

Applying a force of F =196 N upwards, a body of mass 10 kg is raised up to a height of 10 m. Find the work done by the force F and the work done against gravity. Note that the work done by the force F is more than the gravitational potential energy . Show how the law of conservation of energy is still obeyed.