Write the expression for the kinetic energy of a body explaining the meaning of the symbols used.

A ball of mass m is moving with a speed v. What is its kinetic energy?

Name the type of energy (kinetic or potential) possessed by the following:

(a) A moving cricket ball.

(b) A stone at rest on the top of a building.

(c) A compressed spring.

(d) A moving bus.

(e) A bullet fired from a gun.

(f) Water flowing in a river.

(g) A stretched rubber band.

State the energy changes in the following while in use:

(a) An electric bulb

(b) An electric oven

(c) A loudspeaker

(d) A microphone

(e) An electric motor

(f) A wind mill