Definition

Inertia

The inertia of a body is its property due to which it resists any change in its state of rest or uniform motion in a straight line.

Definition

Momentum:

The body's momentum is the quantity of motion possessed by the body. The momentum of a body is equal to the product of its mass and velocity.

Definition

Friction:

The force that opposes the motion of a body is called friction.

Definition

Newton's first law of motion:

Newton's first law of motion states that a body continues its state of rest or uniform motion in a straight line provided no net force acts on it.

Definition

Newton's first law of motion:

Newton's first law of motion states that a body continues its state of rest or uniform motion in a straight line provided no net force acts on it.

Definition

Unit of Force:

SI unit of force is newton (N). It is defined as the force which produces an acceleration of 1 $ms^{-2}$  in a body of mass 1 kg

Definition

Mass:

The mass of a body is the quantity of matter possessed by it. It is a scalar quantity. SI unit of mass is the kilogram (kg).

Definition

Weight:

The weight of a body is the force of gravity acting on it. It is a vector quantity. SI unit of weight is Newton (N).

Definition

Newton's third law of motion:

Newton's third law of motion states that to every action there is always an equal and opposite reaction.

Definition

Law of conservation of momentum:

The Law of conservation of momentum states that the momentum of an isolated system of two or more two interacting bodies remains constant.

Definition

Rolling Friction:

Rolling friction is the force of friction between a rolling body and a surface over which it rolls. Rolling friction is lesser than the sliding friction.

Definition

Circular motion:

The motion of a body moving along a circular path is called circular motion.

Definition

Centripetal force:

The force which keeps the body moving in a circular path is called the centripetal force and is given by:

$F_{c}=\frac{mv^{2}}{r}$

Definition

Centrifugal force:

According to Newton's third law of motion, there exists a   reaction to the centripetal force. The centripetal reaction that pulls the string outward is sometimes called the centrifugal force.