ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 64

Question 316

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Under what condition does a rigid body have only rotational motion?

When no forces act on it
When it is in free fall
When it is moving in a straight line
When it is fixed at a point or along a line

Question 317

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What is the relationship between angular displacement and angular velocity in rotational motion?

Angular velocity is the integral of angular displacement
They are unrelated
Angular velocity decreases as displacement increases
Angular velocity is the rate of change of angular displacement

Question 318

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How does a classical dancer performing a pirouette control their spin speed?

By pushing the floor repeatedly
By changing body mass
By using air currents
By adjusting their moment of inertia through body posture

Question 319

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What is the main assumption about internal forces in proving net internal torque is zero?

Forces are perpendicular to the line joining particles
Forces increase with distance
Forces are negligible
Forces between any two particles act along the line joining them

Question 320

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In which direction is the linear velocity vector of a rotating particle relative to ω and r?

Parallel to ω
Parallel to r
At 45 degrees to both
Perpendicular to both ω and r