ROTATIONAL MOTION

How is angular momentum conserved in a diving motion?

• By increasing body weight
• By using hand movements to push air
• By rotating faster without reason
• By changing body configuration to alter moment of inertia

What determines the magnitude of torque on a particle?

• Force divided by distance
• Sum of force and distance
• Product of force and cosine of angle
• The product of force, distance from origin, and sine of the angle between them

What is the effect of zero external force on the center of mass velocity?

• It increases
• It decreases
• It oscillates
• It remains constant

How does the center of mass respond to external forces?

• It does not respond to external forces
• It moves randomly
• It rotates in place
• It accelerates as if all mass is concentrated there and all external forces act on it

What is the trajectory of a particle not on the axis in a rotating rigid body?

• Straight line
• Parabolic path
• Helical path
• Circular path