Work

To understand work, its unit and dimensions, work done on frictionless horizontal plane, work done against gravity, work done against friction, power, its unit and dimensions, efficiency of power, energy, its unit and dimensions, types of energy, derivation for kinetic and potential energy, potential energy of a spring, relation between K.E. and linear momentum, work energy theorem (principle), principle of conservation of energy, transformation of energy, and mass-energy relation.

Work is said to be done if a force applied on a body moves it a certain distance in the direction of the force. The unit of work is joule (J) and its dimensions are [M L^2 T^-2]

Power is the rate at which work is done or energy is transferred. The unit of power is watt (W) and its dimensions are [M L^2 T^-3]

<p>The principle of conservation of energy states that the total energy of an isolated system remains constant over time, and cannot be created or destroyed, only transformed from one form to another.</p> Signup and view all the answers

<p>Energy of a body is defined as its capacity to do work. The unit of energy is joule (J) and its dimensions are [M L^2 T^-2]</p> Signup and view all the answers