ROTATIONAL MOTION

How does the centre of mass depend on the gravitational field?

• It shifts with gravity
• It does not depend on the gravitational field
• It disappears in zero gravity
• It doubles in strong gravity

What is the centre of mass of a system with particles of masses 2m, m, and m at positions x=0, x=d, and x=2d?

• d/4
• d/2
• 3d/4
• d

How is the centre of mass of a system affected by removing a particle?

• It remains same
• It shifts toward the removed particle
• It shifts away from the removed particle's position
• It becomes zero

If three particles of equal mass form a right-angled triangle, where is the centre of mass?

• At the right angle vertex
• At the circumcentre
• At the centroid of the triangle
• At the midpoint of hypotenuse

How does the centre of mass of a system of particles behave under gravity?

• It moves in a circle
• It follows a parabolic path if projected
• It remains stationary
• It moves randomly