ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 86

Question 426

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What is the unit vector associated with the axis of rotation?

î
ĵ
k̂
n̂

Question 427

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In the absence of external torque, if I doubles, what happens to ω?

ω doubles
ω remains same
ω becomes half
ω becomes zero

Question 428

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What is the significance of Lz = Iω in rotational dynamics?

It relates force and acceleration
It gives kinetic energy
It calculates torque
It relates angular momentum to angular velocity

Question 429

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Why is dL⊥/dt = 0 in fixed-axis rotation?

Because L⊥ is zero
Because torque is zero
Because ω is constant
Because the axis constrains motion to one plane

Question 430

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What determines the direction of the angular momentum vector in fixed-axis rotation?

Direction of velocity
Mass distribution
Axis of rotation
Applied force