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what is neuton's law of motion?

Newton's Laws of Motion

Newton gave three laws to explain the motion of a body.

1.Newton's First Law (Law of Inertia)

It states that the position of rest or of uniform motion of a body will remain unchanged until or unless an external force is applied on it, that is, according to this law, position of a body will not change by itself.

2.Newton's Second Law of Motion

It states that the net external force acting on a body is directly proportional to the rate of change of its momentum that is;

where k is a constant of proportionality and its value is 1 in SI system.

Newton's second law of motion can also be stated as, 'the net external force acting on a body is equal to rate of change of its momentum.'

3.Newton's Third Law of Motion

If states that to every action, there is an equal and opposite reaction.

Action and Reaction forces are always equal in magnitude, opposite in direction and they act on different bodies.