ROTATIONAL MOTION

What is the angular velocity of a stationary rigid body?

• Infinite
• Undefined
• v/r
• Zero

How is the vector nature of angular velocity useful in physics?

• It makes angular velocity dimensionless
• It reduces the need for calculus
• It allows correct determination of linear velocity via cross product
• It eliminates the need for position vectors

What determines the direction of the angular velocity vector besides the rotation axis?

• Mass of the body
• Linear speed
• Radius of rotation
• Sense of rotation (clockwise or counterclockwise)

Is the linear velocity vector constant in direction for a particle in uniform circular motion?

• Yes, always constant
• Yes, only in magnitude
• No, it changes continuously
• It becomes zero

What is the SI unit of angular displacement?

• Degree
• Revolution
• Radian
• Meter