ROTATIONAL MOTION

How does doubling the radius of a ring affect its moment of inertia?

• It doubles
• It becomes four times larger
• It remains the same
• It halves

For a rod of length L, what is the radius of gyration about an axis perpendicular to the rod and passing through its center?

• L/2
• L/√12
• L/6
• L/3

What happens to the moment of inertia if the axis of rotation is shifted parallel to itself?

• It remains unchanged
• It becomes zero
• It changes according to the parallel axis theorem
• It depends on angular speed

Can the moment of inertia of a body be zero?

• Yes, if the body is not rotating
• No, because there is always some mass at a distance from the axis
• Yes, if the mass is very small
• No, only in zero gravity

Which of the following bodies would have the highest moment of inertia for the same mass and radius?

• A solid sphere rotating about its diameter
• A solid disc rotating about its central axis
• A thin ring rotating about its central axis
• A rod rotating about its center