ROTATIONAL MOTION

Can a rotating body be in mechanical equilibrium?

• No, only stationary bodies can be
• Yes, if net force and torque are zero
• Only if not rotating
• Only in space

Under what condition does a rigid body have no angular acceleration?

• When total force is zero
• When velocity is zero
• When total torque is zero
• When mass is uniform

What is the significance of r sinθ in angular momentum?

• Radial distance
• Angular displacement
• It is the moment arm or perpendicular distance
• Time of flight

How is torque related to angular momentum?

• Torque is independent
• Torque equals angular momentum
• Torque equals rate of change of angular momentum
• Torque is half of angular momentum

What remains constant in angular momentum conservation for a free particle?

• Only magnitude
• Only direction
• Speed of particle
• Magnitude and direction of l