What happens to the potential energy of a body when its height is doubled?

A load of 100 kg is pulled up by 5 m. Calculate the work done (g = 9.8 m/s²)

State whether the following statement is true or false:

The potential energy of a body of mass 1 kg kept at a height of 1m is 1J.

What kind of energy is possessed by the following?

(a) A stone kept on roof-top.

(b) A running car.

(c) Water stored in the reservoir of a dam.

(d) A compressed spring

(e) A stretched rubber band.

Fill in the following blanks with suitable words:

(a) Work is measured as a product of ……… and ……………..

(b) The work done on a body moving in a circular path is ………………

(c) 1 joule is the work done when a force of one ……………..moves an object through a distance of one …………… in the direction of ……………….

(d) The ability of a body to do work is called ………. . The ability of a body to do work because of its motion is called ………..

(e) The sum of the potential and kinetic energies of a body is called ………… energy.