AP Physics 1· difficulty 1/5
A disk is in <strong>rotational equilibrium</strong>. Which is true?
Its angular acceleration is zero.
Its angular velocity is zero.
It must be at rest.
Both A and C.
Explanation
Rotational equilibrium = zero net torque = zero angular acceleration. The disk may rotate at any constant angular velocity.
Want 10 more like this — adaptive to your weak spots?
Two blocks m1 = 2\text{ kg} and m2 = 3\text{ kg} hang on a string over a uniform-disk pulley of mass M = 2\text{ kg} and radius R. What is the magnitude of acce…
chevron_rightA wheel (I = 0.20\text{kg·m}^2) experiences a constant net torque of 0.80\text{N·m}. After 5.0\text{s}, starting from rest, its angular speed is…
chevron_rightA flywheel (I = 0.50\text{kg·m}^2) is acted on by a net torque of 4.0\text{N·m}. Its angular acceleration is…
chevron_right