ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 493

Question 2461

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What is the relationship between the total mass and the center of mass velocity in momentum conservation?

P = M/V
P = M + V
P = V - M
P = MV relates them directly

Question 2462

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Why does the center of mass of a system not accelerate if no external force acts?

Because internal forces cancel
Because mass becomes infinite
Because velocity is zero
Because net force is zero, so acceleration is zero

Question 2463

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What is the vector nature of the total momentum of a system?

It is a scalar quantity
It is a tensor
It has magnitude only
It is a vector quantity with magnitude and direction

Question 2464

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Can internal forces change the total kinetic energy of a system?

No, never
Only if external forces are present
Only in vacuum
Yes, they can

Question 2465

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What is the role of mass in the motion of the center of mass?

It determines the speed directly
It has no role
It affects only internal motion
It determines the inertia of the center of mass motion