ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 269

Question 1341

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Under what condition do the centre of gravity and centre of mass coincide?

Only in symmetric bodies
In zero gravity
In non-uniform gravitational field
In a uniform gravitational field

Question 1342

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What does the equation Σ mᵢrᵢ = 0 imply about the reference point?

It is arbitrary
It is the point of suspension
The reference point is the centre of mass
It is the geometric center

Question 1343

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Why can g be factored out of the summation in the torque equation?

Because g is zero
Because g varies with height
Because g is a scalar
Because g is constant for all particles in a uniform gravitational field

Question 1344

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What happens to the total gravitational torque when calculated about the centre of gravity?

It equals the weight
It is maximum
It is negative
It is zero

Question 1345

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How is the centre of gravity related to rotational equilibrium?

It increases rotation
It has no relation
It is the point where net gravitational torque is zero
It stops all motion