ROTATIONAL MOTION

What is the significance of the equation dL/dt = τ in rotational dynamics?

• It describes gravity
• It measures heat
• It is the rotational analog of Newton’s second law
• It calculates area

Why is the cross product used in the definition of torque and angular momentum?

• To add magnitudes
• To simplify algebra
• Because it captures the perpendicular component essential for rotation
• To reduce computation

What determines the direction of the vector CP in rotational motion?

• It is fixed in space
• It points along the axis
• It points from the axis to the particle in the plane perpendicular to the axis
• It opposes velocity

How does the total angular momentum of a system behave in the absence of external torque?

• It increases exponentially
• It oscillates randomly
• It dissipates
• It remains constant in magnitude and direction

Why is the expression OC × v important in angular momentum analysis?

• It measures temperature
• It determines color
• It contributes to the transverse component L_⊥
• It calculates weight