A light string is attached to a massive pulley of known rotational inertia \(I_P\), as shown in the figure. A student must determine the relationship between the torque exerted on the pulley and the change in the pulley’s angular velocity when the torque is applied for \(2.0\text{ s}\). In addition to a stopwatch to measure the time interval, what two measurements could the student make in order to determine the relationship? Select two answers.