ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 355

Question 1771

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What is implied by L = constant in angular momentum conservation?

Speed is constant
Only direction is fixed
Only magnitude is fixed
Total angular momentum does not change in time

Question 1772

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Why is angular momentum a vector quantity?

It is always positive
It depends on scalar mass
It has magnitude and direction in space
It is measured in joules

Question 1773

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In the expression τ = Σ r_i × F_i, what does F_i represent?

Only external force
Only internal force
Gravitational force only
Vector sum of external and internal forces on ith particle

Question 1774

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What determines the direction of torque?

Direction of r only
Direction of F only
Left-hand rule
Right-hand rule applied to r × F

Question 1775

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How does angular momentum conservation compare to linear momentum conservation?

They are unrelated
Both require rigid bodies
Both occur when net external influence is zero
They only apply in circular motion