ROTATIONAL MOTION

If a particle moves in a circle of radius r with angular velocity ω, what is the magnitude of its linear velocity?

• ω/r
• r/ω
• ω²r
• ωr

What happens to the angular velocity of a rigid body if it completes more revolutions per second?

• It decreases
• It remains constant
• It becomes zero
• It increases

How does the linear speed of a particle in a rotating rigid body depend on its distance from the axis?

• Inversely proportional
• Independent
• Quadratically proportional
• Directly proportional

Why is the origin chosen on the axis of rotation when analyzing rotational motion?

• To make r zero
• To align r with ω
• To ensure r is perpendicular to ω
• To eliminate angular velocity

In the vector equation v = ω × r, what does r represent?

• Radius of gyration
• Distance from center of mass
• Position vector from origin to the particle
• Tangential displacement vector