ROTATIONAL MOTION

What is the rotational analog of Newton’s second law?

• F = mv
• p = mv
• E = mc²
• τ = Iα

What happens to the angular velocity of a rotating platform when a person walks toward the center?

• It decreases
• It remains the same
• It becomes zero
• It increases

How is angular momentum conserved in an isolated system?

• It increases gradually
• It decreases to zero
• It changes randomly
• Total angular momentum remains constant in the absence of external torque

What is the condition for a rigid body to be in static equilibrium?

• Only net force zero
• Only net torque zero
• Net force zero and net torque non-zero
• Both net force and net torque must be zero

On what does the value of torque depend when a force is applied to a body?

• Only on force magnitude
• Only on distance from pivot
• Only on direction
• Magnitude of force, point of application, and direction of force