Torque:

In relation to moment of force, or torque, it can be said that “the angular acceleration of an object is proportional to the net torque acting on it and inversely proportional to the object t=Ia” (Blazevich, 2010). This means that torque is equal to inertia multiplied by angular acceleration. Greater torque can be generated by quicker rotation at the joint, which, in the case of the tennis serve, is located at the shoulder. To generate greater torque a tennis player must reach right back behind their back with their racquet. The quicker they are able to snap their arm back around and through the ball the more force will be generated. Whilst muscle plays a role in generating greater torque, it can somewhat be dependent on a person’s arm length (Blazevich, 2010).