Moment of force, is the product of force & its perpendicular distance from its pivot to the line of action of the force, Centre of gravity, is the point on/outside the body where its weight appears to act, work done, is the product of the force & the distance moved by the object in the direction of the force, Energy, is the ability to do work, Kinetic energy, is the energy possessed by an object because of its motion, Gravitational potential energy, is the energy stored in a body due to its height from the ground, Power, is the rate of doing work, Principal of moments, When an object is in equillibrium, the sum of clockwise moments is equal to the sum of anti-clockwise moments about the same pivot., Principal of conservation of energy, Energy cannot be created or destroyed but can only be transformed from one form to another. The total energy in an isolated system is constant.

Physics Definitions Chapter 5-6

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