ROTATIONAL MOTION

How does the angular momentum of a system change if an external torque is applied?

• It remains constant
• It decreases to zero
• It becomes infinite
• It changes at a rate equal to the applied torque

What is the effect of doubling the mass of a rotating object on its moment of inertia, assuming size and shape remain unchanged?

• It halves it
• It quadruples it
• It remains the same
• It doubles the moment of inertia

In rotational motion, what does the term 'rigid body' imply about inter-particle distances?

• They vary randomly
• They decrease over time
• They increase with speed
• They remain constant during motion

What is the significance of the radius of gyration in rotational motion?

• It measures the actual radius of the body
• It determines the color
• It indicates temperature
• It provides a measure of how mass is distributed about the axis of rotation

How does the moment of inertia of a body change if the axis of rotation is shifted parallel to itself?

• It decreases
• It remains the same
• It becomes zero
• It increases as the axis moves farther from the center of mass