ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 274

Question 1366

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How does gravity contribute to torque on individual particles?

By pushing sideways
By creating heat
By acting upward
By acting downward and creating a turning effect about CG

Question 1367

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What is the condition for zero net torque in a balanced body?

All forces must be zero
Only one force should act
Sum of clockwise and counterclockwise torques must be equal
The object must be circular

Question 1368

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Is the centre of gravity the same as the centre of buoyancy?

Yes, they are the same
No, but they always coincide
No, centre of buoyancy is for fluid upthrust, CG is for gravity
Yes, both are central points

Question 1369

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What happens to the reaction force if the cardboard is heavier?

It decreases
It becomes zero
It changes direction
It increases to match the weight

Question 1370

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Why is the position vector measured from the CG in torque calculations?

To complicate the equation
To reduce mass
Because torque is calculated about a reference point
Because it increases gravity