1. A diver in a swimming pool bends his head before diving. It
- A) Increases his linear velocity
- B) Decreases his angular velocity
- C) Increases his moment of inertia
- D) Decreases his moment of inertia
Correct Answer: D) Decreases his moment of inertia
2. The angular momentum of a system of particles is conserved
- A) When no external force acts upon the system
- B) When no external torque acts upon the system
- C) When no external impulse acts upon the system
- D) When axis of rotation remains the same
Correct Answer: B) When no external torque acts upon the system
