ROTATIONAL MOTION

For a rigid body, what does the radius of gyration represent?

• The average radius of the object
• Distance from the axis where the entire mass can be considered concentrated
• The diameter of the rotating body
• The height of the center of mass

Which physical quantity in rotational motion corresponds to mass in linear motion?

• Angular momentum
• Torque
• Moment of inertia
• Linear velocity

What is the expression for the moment of inertia of a thin ring of mass M and radius R rotating about its central axis?

• ½ MR²
• MR²
• ⅓ MR²
• ¼ MR²

What is the SI unit of moment of inertia?

• kg/m²
• kg² m
• kg m²
• kg m/s²

Which of the following best describes the moment of inertia of a body?

• It is the total linear momentum of the body
• It is a measure of rotational inertia of the body
• It is the gravitational force acting on the body
• It is the angular velocity of the body