ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 646

Question 3226

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What is the primary reason for introducing the concept of center of mass in mechanics?

To measure the size of a body
To determine the color of the object
To calculate internal energy
To simplify the analysis of motion of extended bodies

Question 3227

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How does doubling the angular speed affect rotational kinetic energy?

It doubles it
It halves it
It remains the same
It quadruples the kinetic energy

Question 3228

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What is the role of symmetry in determining the center of mass?

It makes center of mass unpredictable
It shifts it outward
It eliminates it
It helps locate the center of mass at the geometric center for uniform objects

Question 3229

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Can a body have angular momentum even if its center of mass is at rest?

No, never
Only in space
Only if moving linearly
Yes, if it is rotating about its center of mass

Question 3230

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What is the effect of external torque on angular momentum?

It has no effect
It stabilizes it
It makes it zero
It changes the angular momentum of the system