ROTATIONAL MOTION

What is the primary purpose of defining angular velocity as a vector?

• To make it dimensionless
• To reduce equations
• To correctly compute linear velocity in 3D
• To eliminate r

How does the magnitude of v = ω × r depend on the angle between ω and r?

• Maximum when parallel
• Independent of angle
• Maximum when perpendicular
• Minimum at 90°

What is the linear velocity of a particle at radius r if ω = 0?

• ωr
• r
• Zero
• Infinite

If angular velocity is constant, what is the angular acceleration?

• Constant
• Infinite
• Zero
• Negative

What is the dot product of ω and r in rotational motion?

• ωr
• -ωr
• 1
• Zero