ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 99

Question 491

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Why do internal forces not contribute to the net torque in a system of particles?

They are too weak
They act only radially
They occur in equal and opposite pairs that cancel torques
They increase friction

Question 492

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What is the role of the right-hand rule in determining the direction of CP × v?

It measures distance
It calculates energy
It gives the direction of the axial angular momentum component
It determines mass

Question 493

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How does the choice of origin affect the value of total angular momentum?

No effect
It reverses direction
It changes the position vectors, thus altering angular momentum
It affects only mass

Question 494

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What is the physical implication of L_⊥ ≠ 0 in a rotating rigid body?

It rotates faster
It becomes lighter
The body will exhibit wobbling or precession during rotation
It stops rotating

Question 495

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Why is the unit vector k̂ used in expressing L_z = I ω k̂?

To measure speed
To calculate mass
To indicate the direction of the fixed rotation axis
To represent time