ROTATIONAL MOTION

For a rigid body rotating about a fixed axis, what happens to the direction of angular velocity vector ω?

• It changes continuously
• It reverses periodically
• It remains constant
• It depends on linear velocity

In rotational motion, what does r⊥ represent?

• Total position vector
• Parallel component of r
• Perpendicular distance from the axis of rotation
• Angular displacement

What is the magnitude of ω × r when r is replaced by r⊥?

• ω r
• ω r⊥
• ω² r⊥
• r⊥ / ω

What is the direction of the vector ω × CP in rotational motion?

• Along the radius CP
• Along the axis of rotation
• Along the tangent to the circle at point P
• Opposite to angular velocity

Which of the following represents the linear velocity of a particle in rotational motion?

• v = ω + r
• v = ω × r
• v = ω · r
• v = r × ω