ROTATIONAL MOTION

What is the role of mass distribution in determining the centre of mass?

• No role
• Minor role
• It directly determines the position
• It affects only rotation

How is the position of the centre of mass calculated for discrete particles?

• Simple average of positions
• Geometric mean
• As a mass-weighted average of position vectors
• Random selection

What happens to the centre of mass during a collision between two bodies?

• It stops
• It changes direction randomly
• Its motion remains unaffected if no external force acts
• It accelerates

What is the primary reason for defining the centre of mass?

• To find the geometric centre
• To measure density
• To simplify the motion analysis of extended bodies
• To calculate volume

How is the centre of mass analogous to a point mass?

• It has the same density
• It is always smaller
• It responds to external forces like a point mass
• It has zero volume