ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 640

Question 3196

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What is the role of the center of mass in gravitational potential energy calculations?

It has no role
It doubles the energy
It reduces energy to zero
It allows the entire mass to be treated as concentrated at that point

Question 3197

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How does the kinetic energy of rotation depend on angular velocity?

Linearly proportional
Inversely proportional
Independent of angular velocity
It is proportional to the square of angular velocity

Question 3198

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What is the angular momentum of a particle moving in a straight line past a point?

Always zero
Always infinite
Depends on mass only
It is non-zero if the line of motion does not pass through the point

Question 3199

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Why is the motion of the center of mass unaffected by internal forces in a system?

They are too weak
They act randomly
They do not exist
Internal forces occur in equal and opposite pairs that cancel out

Question 3200

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What is the direction of torque when a force tends to produce counterclockwise rotation in the xy-plane?

Along the negative x-axis
Along the positive y-axis
Along the negative z-axis
Along the positive z-axis