Rotational Dynamics cont.

Moment of Inertia: Inertia = objects have a degree of reluctance to move. Moment of inertia is this but in rotational movement. Objects oppose the movement of angular acceleration. The more they oppose, the greater the moment of inertia (kgm²)

Circular disc: I = Mr²/2

Solid cylinder: I = Mr²

Solid sphere: I = 2Mr²/5

Kinetic Energy: EK = ½Iω²

Torque: Turning force

Pulling force causes torque, T: T = Fr

In terms of inertia: T = Iα