ROTATIONAL MOTION

How does the centre of mass help in spacecraft docking?

• To increase fuel
• To reduce speed
• To align trajectories and prevent rotational disturbances
• To play music

What is the outcome of Eq. (6.11) for a system with zero external force?

• It accelerates
• It decelerates
• The centre of mass moves with constant velocity
• It stops

How is the centre of mass related to stability?

• Higher CM is always better
• CM height has no effect
• A lower centre of mass increases stability
• Stability depends only on weight

What is the importance of the centre of mass in sports?

• To increase weight
• To reduce height
• To optimize performance by controlling body motion
• To change uniform color

How does the centre of mass concept apply to deformable bodies?

• It does not apply
• CM moves randomly
• The CM still moves according to external forces regardless of deformation
• CM vanishes during deformation