ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 483

Question 2411

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What is the momentum of a system of two identical particles moving in opposite directions with the same speed?

Twice the momentum of one particle
Equal to one particle's momentum
Half the momentum of one particle
Zero

Question 2412

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Under what condition does the center of mass of a system accelerate?

Whenever internal forces act
When particles move randomly
When the system rotates
When a net external force acts on the system

Question 2413

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What is the effect of a sudden internal explosion on the kinetic energy of a system?

It always decreases
It remains unchanged
It becomes zero
It can increase due to conversion of internal energy

Question 2414

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How does the velocity of the center of mass relate to the individual velocities of particles in a system?

It is the arithmetic average of all velocities
It is always zero
It is the highest individual velocity
It is the mass-weighted average of all particle velocities

Question 2415

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What is the main advantage of using the center of mass concept in physics?

It eliminates all forces
It makes calculations longer
It increases complexity
It simplifies the analysis of complex systems