ROTATIONAL MOTION

What physical quantity is represented by r × F?

• Linear momentum
• Angular velocity
• Moment of inertia
• Torque

What is the result of differentiating angular momentum l = r × p with respect to time?

• dl/dt = F
• dl/dt = p
• dl/dt = v
• dl/dt = τ

Why does the term dr/dt × p vanish in the derivation of torque?

• Because p is constant
• Because r is constant
• Because time derivative of momentum is zero
• Because dr/dt and p are parallel vectors

Which rule is applied when differentiating the cross product r × p with respect to time?

• Chain rule
• Sum rule
• Quotient rule
• Product rule of differentiation

How is the total angular momentum of a system of n particles determined?

• By multiplying all individual angular momenta
• By scalar addition of angular momenta
• By averaging the angular momenta
• By vectorially adding the angular momenta of all individual particles