ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 66

Question 326

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What is the role of external forces in determining the motion of the center of mass?

External forces have no effect
External forces act only on individual particles
The center of mass moves as if all external forces act on it
External forces cancel out

Question 327

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If a system is isolated, what can be said about its center of mass motion?

It accelerates randomly
It comes to rest
It moves in a circular path
It moves with constant velocity

Question 328

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What is the effect of internal forces on the total linear momentum of a system?

They increase momentum
They decrease momentum
They reverse momentum direction
They do not change the total linear momentum

Question 329

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For general rotation of a rigid body with one point fixed, what is the reference for the position vector r in v = ω × r?

The center of the Earth
The edge of the body
The highest point of the body
The fixed point taken as the origin

Question 330

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What is the direction of the angular velocity vector in fixed-axis rotation?

Tangential to the circular path
Radially outward
Opposite to linear velocity
Along the axis of rotation