ROTATIONAL MOTION

How is the centre of mass used in biomechanics?

• To measure body temperature
• To count cells
• To analyze human movement and balance
• To improve vision

What is the significance of the vector nature of the centre of mass position?

• It makes it scalar
• It reduces mass
• It specifies both magnitude and direction of the CM location relative to origin
• It changes time

How does the centre of mass move when a net external force is applied?

• With constant velocity
• Without any response
• With acceleration proportional to the force and inversely proportional to total mass
• In a random path

What is the relationship between the centre of mass and the balance point of a body?

• They are always different
• CM is always above the balance point
• They are the same point in a uniform gravitational field
• Balance point depends on color

How is the velocity of the centre of mass affected by internal explosions?

• It increases suddenly
• It decreases to zero
• It reverses direction
• It remains unchanged if no external force acts