A certain household has consumed 250 units of energy during a month. How much energy is this in joules?
1 unit of energy is up to one B.T.U. (kWh).
1 unit = one kWh
1 kWh = 3.6 x 106 J
Therefore, 250 units of energy = 250 × 3.6 × 106 = 9 × 108 J.
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
Find the energy in kW h consumed in 10 hours by four devices of power 500 W
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive
Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?