Name the quantity which is measured in

(a) kWh

(b) kW

(c) Wh

(d) eV

Is it possible that no transfer of energy takes place even when a force is applied to a body?

How is the work done by a force measured when

(i) force is in direction of displacement,

(ii) force is at an angle to the direction of displacement?

A body is acted upon by a force. State two conditions when the work done is zero.