ROTATIONAL MOTION

What happens to the center of mass of a system when the total external force acting on it is zero?

• It accelerates
• It comes to rest
• It moves with constant velocity
• It oscillates

How does the momentum of a system change when it emits a particle?

• It increases by the particle's momentum
• It remains unchanged
• It becomes zero
• It changes by an amount equal and opposite to the emitted particle's momentum

What is the primary factor that determines whether the center of mass accelerates?

• Internal energy
• Temperature of the system
• Color of the object
• Presence of net external force

In which of the following scenarios is the center of mass velocity constant?

• A car accelerating on a road
• A ball thrown upward
• A satellite in orbit
• A spacecraft coasting in deep space

What is the effect of doubling the mass of a system on the velocity of its center of mass, assuming momentum is conserved?

• Velocity doubles
• Velocity remains the same
• Velocity quadruples
• The velocity is halved