Newton’s First Law of Motion or Law of Inertia
According to this law: In the absence of external force, every body continues its state of rest or uniform motion in a straight line.
Newton’s first law of motion gives the idea (definition) of inertia and force.
Newton’s second law of motion
It states that the rate of change of momentum of a body is directly proportional to the external force applied on the body and the change takes place in the direction of the applied force.
Newton’s third law of motion
According to Newton’s third law of motion, ‘To every action, there is an equal and opposite reaction’.
ImpulseA large force acting for a short time to is called an impulsive force.
impulse of a force is equal to the change in momentum.
Impulse is a vector quantity. Its direction is same as that of force or the change in momentum.
The SI unit of impulse =kgm/s