ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 350

Question 1746

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Why is angular momentum conservation useful in problem solving?

It replaces Newton's laws
It is always true
It provides a constant of motion when τ_ext = 0
It calculates energy

Question 1747

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What is the basis for separating τ into ext and int parts?

For convenience only
Due to measurement error
Forces on each particle are sum of external and internal
Because internal forces are negligible

Question 1748

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How does the total angular momentum of a system behave under central external forces?

It is always conserved
It decreases
It changes unless torque is zero
It becomes zero

Question 1749

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What is the relationship between angular momentum and linear momentum?

L = p × r
L = r + p
L = r · p
L = r × p for a single particle

Question 1750

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Can a single force produce zero torque?

No, every force produces torque
Yes, only if force is zero
Yes, if it acts along the position vector
Yes, only in vacuum