ROTATIONAL MOTION

What principle explains a skater spinning faster when pulling arms in?

• Conservation of mechanical energy
• Newton's first law
• Law of inertia
• Conservation of angular momentum

What happens to center of mass velocity when net external force is zero?

• Increases
• Decreases
• Oscillates
• Remains constant

What path does a particle follow if it is not on the rotation axis in a rigid body?

• Straight line
• Parabola
• Helix
• Circular path

Under what condition does a rigid body exhibit only rotational motion?

• When no forces act
• When in free fall
• When moving straight
• When it is fixed at a point or along a line

What is the relationship between angular displacement and angular velocity?

• Angular velocity is the integral of displacement
• They are unrelated
• Angular velocity decreases as displacement increases
• Angular velocity is the rate of change of angular displacement