ABSTRACT
Newton’s three laws of motion can also be applied to angular movement of the human body. The first angular analogue states: the angular momentum of a body remains constant unless a net external torque acts on the body. The second law states: when a torque acts on an object the change in angular motion experienced takes place in the direction of the applied torque and is proportional to the size of the applied torque. The third law states: whenever an object exerts a torque on another object there will be an equal and opposite torque exerted by the second object on the first object. All of Newton’s laws of angular motion can be applied to many aspects of human movement, from kicking a soccer ball to throwing a javelin. They are also critical to defining both efficient performance and the consequences and prevention of injuries.
