ROTATIONAL MOTION

What is the geometric relationship between ω and r in rotational motion?

• Parallel
• At 45°
• Perpendicular to each other
• Opposite directions

What is the effect of increasing the radius on angular velocity if linear velocity is kept constant?

• Increases
• Remains same
• Becomes zero
• Angular velocity decreases

How is the position vector r oriented relative to the axis of rotation?

• Always parallel to axis
• Always tangential
• Perpendicular component determines motion
• Independent of axis

What happens to the angular velocity vector if the rotation stops?

• It reverses direction
• It doubles
• It becomes zero
• It points downward

What is the significance of the vector nature of angular velocity?

• It makes ω dimensionless
• It reduces the number of equations
• It allows correct 3D velocity calculation via v = ω × r
• It eliminates the need for r