Work, Energy & Power Questions with Solutions

This topic covers work and its units, kinetic and potential energy, the law of conservation of energy, energy conversions in everyday devices, power and its units, and simple machines. Questions usually ask about energy conversions (a battery converts chemical energy into electrical energy, and an electric motor converts electrical energy into mechanical energy), the unit of power (the watt), and how one horsepower relates to watts (about 746 W). Remember that no work is done when the displacement is zero or perpendicular to the force. Practise the work, energy and power questions below, written in the style of the general awareness sections of exams such as SSC, banking, railways, CUET GAT, MAH CET and CLAT. Each question comes with a detailed explanation that adds related facts, so every question helps you revise more than one point.