Kinesiology, Biomechanics and Sports — Physical Education STD 12 Commerce — Question

Law of Inertia: It is the first law of motion. According to this law, ''A body at rest will remain at rest and a body in motion will remain in motion at the same speed and in the same direction unless acted on by an external force."

There are a great number of examples of this law in the field of sports and games, such as starting in rowing, starting on roman rings, starting in sprinting, starting in throwing the hammer, raising an opponent in wrestling, etc. Basically if an object is in motion, it remains in motion unless something or some external force stops it. The external force may be gravitational force, the surface of the playing field, a defensive player or the braking action of the sportsperson's body to stop.