ROTATIONAL MOTION

What is the effect of external force on the momentum of the centre of mass?

• No effect
• It stabilizes momentum
• It changes the momentum
• It makes it zero

If two particles of equal mass move in opposite directions with same speed, what is the velocity of the centre of mass?

• v
• 2v
• Zero
• v/2

What is the relationship between total force and centre of mass acceleration?

• Inversely proportional
• No relationship
• Directly proportional via total mass
• Depends on temperature

How does the centre of mass behave in an isolated system?

• Accelerates continuously
• Oscillates
• Moves with constant velocity
• Comes to rest

What determines the trajectory of the centre of mass?

• Internal forces
• Shape of the body
• External forces only
• Initial position only