ROTATIONAL MOTION

How is the centre of mass affected by the addition of a particle at the current centre of mass?

• It shifts toward origin
• It remains at the same point
• It moves away
• It doubles

For a system of particles with a plane of symmetry, where does the centre of mass lie?

• Outside the plane
• On the plane of symmetry
• At the edge
• At a vertex

What is the effect on the centre of mass if a particle is moved such that its distance from the origin doubles?

• X always doubles
• It remains same
• It depends on the direction of movement
• It halves

If a system has particles only on the z-axis, where is the centre of mass located?

• At the origin
• On the z-axis
• At infinity
• In the xy-plane

How does the centre of mass relate to the first moment of mass?

• It is the same as first moment
• It is obtained by dividing the first moment by total mass
• It is the product
• It is unrelated