ROTATIONAL MOTION

What happens when a couple acts on a free rigid body?

• It translates only
• It remains at rest
• It rotates about its center of mass
• It explodes

What is the condition for zero net torque in a two-force system?

• Forces must be zero
• Forces must be in same direction
• The torques must be equal in magnitude and opposite in direction
• Distances must be zero

How does symmetry influence torque balance in a rod?

• It increases torque
• It causes imbalance
• It allows equal and opposite torques to cancel easily
• It has no effect

What is the role of the center of mass in rotational motion?

• It increases gravity
• It stops rotation
• It is the point about which rotation occurs in the absence of net force
• It has no role

Can a single force produce rotational equilibrium?

• Yes, always
• No, because it always produces torque about some point
• Only in vacuum
• Only if it is zero