ROTATIONAL MOTION

What are the two conditions required for a rigid body to be in complete equilibrium?

• Only net force zero
• Only net torque zero
• Net force zero and net torque non-zero
• Net force and net torque both zero

Under what condition does a rigid body remain in rotational equilibrium?

• When net force is zero
• When it is not moving
• When it is in vacuum
• When the net external torque is zero

Under what condition does a rigid body remain in translational equilibrium?

• When net torque is zero
• When it is rotating
• When it is in space
• When the net external force is zero

What is the magnitude of linear velocity of a point on a rotating rigid body?

• Sum of angular and radial speeds
• Difference between angular and radial speeds
• Product of angular speed and distance from axis
• Half of angular speed

What determines the direction of angular velocity vector?

• Left-hand rule
• Direction of linear velocity
• Opposite to torque
• Right-hand rule