Define the following terms.
(a) Work was done (b) Energy (c) Mechanical energy (d) Kinetic energy
(e) Potential energy (f) Power (g) Commercial unit of energy.
(a) Work done: Work done by a force acting on an object is equal to the magnitude of the force multiplied by the distance moved in the direction of the force.
(b) Energy: Energy of a body is defined as the capacity or ability of the body to do work.
(c) Mechanical energy: Mechanical energy includes kinetic energy and potential energy.
(d) Kinetic energy: The energy possessed by a body by virtue of its motion.
(e) Potential energy: The energy possessed by a body due to its position or configuration.
(f) Power: Power is defined as the rate of doing work or the rate of transfer of energy.
(g) Commercial unit of energy: The energy used in households, industries, and commercial establishment are usually expressed in kilowatt-hour.
1 kWh 1 unit = 3.6 × 106 J