Angular displacement: angle through which an object rotates | Linear displacement: change in position of an object in a straight line.

Angular velocity: rate of change of angular displacement | Linear velocity: rate of change of linear displacement.

Angular acceleration: rate of change of angular velocity | Linear acceleration: rate of change of linear velocity.

Clockwise: Typically assigned a negative value. | Counterclockwise: Typically assigned a positive value.

The disk experiences angular deceleration and eventually comes to rest.

The object's angular velocity increases linearly with time.

The moment of inertia increases.

For a given time interval, the angular displacement increases.

The angular velocity remains constant.

$$\omega_{avg} = \frac{\Delta \theta}{\Delta t}$$ where $\omega_{avg}$ = average angular velocity, $\Delta \theta$ = change in angular displacement and $\Delta t$ = change in time.

$$\alpha_{avg} = \frac{\Delta \omega}{\Delta t}$$ where $\alpha_{avg}$ = average angular acceleration, $\Delta \omega$ = change in angular velocity and $\Delta t$ = change in time.

$$\theta = \theta_0 + \omega_0 t + \frac{1}{2} \alpha t^2$$ where $\theta$ = angular displacement at time $t$, $\theta_0$ = initial angular displacement, $\omega_0$ = initial angular velocity and $\alpha$ = angular acceleration.

$$\omega^2 = \omega_0^2 + 2\alpha(\theta - \theta_0)$$ where $\omega$ = angular velocity at angular displacement $\theta$, $\omega_0$ = initial angular velocity, $\alpha$ = angular acceleration and $\theta_0$ = initial angular displacement.