SSC MTS EXAM

Detailed explanation-1: -joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds.

Detailed explanation-2: -Scientists use the joule to measure work. One joule is equal to the work done by a force of one newton to move an object one meter in the direction of the force.

Detailed explanation-3: -It will not be uncommon to measure energies in thousands of joules, so the kilojoule (kJ) is a common unit of energy, with 1 kJ equal to 1, 000 J. The calorie is used when considering nutrition. Energy contents of foods are often expressed in calories.