ROTATIONAL MOTION

What is the main purpose of defining the center of mass in this context?

• To find the heaviest part
• To locate the geometric center
• To balance the body only
• To identify the point that follows translational trajectory

Which point remains stationary in the rotation of a top?

• The center of mass
• The highest point
• The middle of the shaft
• The tip in contact with the surface

What is the motion of a rigid body when no external force acts on it?

• It stops immediately
• Only rotation
• Only vibration
• Either pure translation or combination of translation and rotation

How is rotational motion defined for a pivoted rigid body?

• It is always pure translation
• It cannot rotate
• It is random motion
• It is rotation about a fixed or moving axis through a pivot point

What type of motion does an oscillating table fan exhibit?

• No motion
• Pure translation
• Rotation about a fixed axis
• Rotation about a moving axis