Angular Momentum - Physics Quiz

What is angular momentum?

• The rotational equivalent of linear momentum

• The speed of rotation

• The force of rotation

• The torque applied over time

Which equation defines angular momentum (L)?

• L = Iω

• L = mv

• L = Fd

• L = 2r

What is moment of inertia (I)?

• The rotational inertia of an object

• The mass of an object

• The weight of an object

• The angular speed

Which variable represents angular velocity?

• ω

• v

• F

• I

What is the unit of angular momentum?

• kgm/s

• kgm/s

• Nm

• J/s

What does the conservation of angular momentum state?

• Angular momentum remains constant if net external torque is zero

• Angular momentum is always increasing

• Angular speed must be zero

• Force equals mass times acceleration

Why does an ice skater spin faster when pulling in her arms?

• Her moment of inertia decreases

• Her mass increases

• She applies more torque

• Friction increases

What must be true for angular momentum to be conserved?

• No external torque

• Constant angular speed

• No friction

• Balanced forces

What causes a change in angular momentum?

• A net external torque

• Gravity

• Friction alone

• Mass changes

If the moment of inertia is reduced, what happens to angular velocity (if L is conserved)?

• It increases

• It decreases

• It stays the same

• It reverses