Quiz on Rotational Motion and Angular Momentum

What is the formula for the moment of inertia (I) of a rigid body?

• I = F d

• I = m v^2

• I = Σm_i r^2

• I = m a

In which unit is the moment of inertia measured in the SI system?

• Kilograms per meter squared (kg m^2)

• Kilograms per second (kg/s)

• Newton meters (N m)

• Joules (J)

What is the relationship between angular momentum (L) and moment of inertia (I) for a rotating body?

• L = I + ω

• L = I - ω

• L = I/v

• L = Iω

What happens to the angular momentum of a point mass if the net torque acting on it is zero?

• It decreases

• It increases

• It remains constant

• It becomes zero

When a figure skater pulls in their arms, what principle are they demonstrating?

• Conservation of angular momentum

• Newton's first law

• Conservation of energy

• Frictional force