ROTATIONAL MOTION

How is the centre of mass position affected by adding a new particle?

• It remains unchanged
• It always moves to origin
• It shifts toward the added particle depending on its mass and position
• It disappears

What is the main limitation of the centre of mass concept?

• It cannot be calculated
• It is always moving
• It does not describe rotational or internal motions
• It depends on temperature

How does the centre of mass behave in a freely falling system?

• It floats
• It accelerates faster than g
• It falls with acceleration g
• It moves sideways

Why is the centre of mass frame useful in studying collisions?

• All particles stop
• Energy is not conserved
• It simplifies momentum conservation analysis
• Forces disappear

What happens to the centre of mass when two particles of different masses move toward each other?

• It stays fixed
• It moves toward the lighter particle
• It moves toward the heavier particle
• It vanishes