ROTATIONAL MOTION

What defines the axis of rotation in a rotating rigid body?

• It is the path of the center of mass
• It is the direction of gravitational force
• It is the fixed line about which all particles move in circular paths
• It is the longest dimension of the body

What is the motion of a wheel that is spinning in place without moving forward?

• Pure translational motion
• Rolling motion
• Pure rotational motion
• Oscillatory motion

Which of the following best describes the motion of a rigid body in pure translation?

• Points move in circles
• Velocities vary
• All points move with the same velocity
• Only center moves

What is the velocity of a point on a rolling object that is at the same level as the center but on the side?

• Zero
• Same as center
• Perpendicular to motion
• Equal in magnitude to center's velocity but perpendicular direction

What is the motion of a rigid body that is both moving and spinning in space without constraints?

• Pure translation
• Pure rotation
• General plane motion
• Random motion