The weight is known as the force with which a body gets attracted towards the centre of the earth. It is given by the formula W = m × g . Unit of weight in SI is, Newton ( N ) . Unit of weight in CGS is, dyne .

The motion of an object is defined as the movement of an object from its position over time. A body is said to be in a state of rest when there is no change in its position over time with respect to its surroundings. There is no movement of an object when it is in rest.

One complete to and fro motion of the bob of a pendulum about its mean position is called one oscillation. For example, the motion of the bob from B to A, then from A to C and back to B is called one oscillation.

Weight is the force of gravity acting on an object due to its mass. Weight is another word for the force of gravity. This is given by the product of mass and acceleration due to gravity. Its SI unit is also the same as that of force, SI unit of weight is Newton (N). The force exerted on a body by gravity. This is often expressed in the formula W = m g , where W is the weight, m the mass of the object, and g gravitational acceleration.