A student spins a bicycle wheel so that its angular velocity changes from to in
PHYSICS · Subjective · AP · Physics C: Mechanics · Torque and Rotational Dynamics · Torque and Rotational Dynamics
Problem
A student spins a bicycle wheel so that its angular velocity changes from +6.0rad/s to −2.0rad/s in 4.0s, where the + sign denotes counter-clockwise (CCW) rotation. Describe the direction (CW or CCW) of the wheel’s angular acceleration during this interval and briefly explain your reasoning.