Question

Which statement best describes the conservation of momentum? 1. When Newton's 3rd law applies to objects...

Which statement best describes the conservation of momentum?

1. When Newton's 3rd law applies to objects inside and outside of the system because forces are causing acceleration.

2. When there are no unbalanced exerternal forces acting on the system.

3.When the center of mass of the system moves in a circular path.

4.When the center of mass of the system is not accelerating.

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Homework Answers

Answer #1

statement-1, since body is accelerating, momentum is not conserved.

statement-2, external forces are acting on the system, so from newton's second law, acceleration is produced and hence no momentum is conserved.

statement-3, COM is moving in a circular path, it can move with a variable or constant speed. so the statement is insufficient to say about conservation of momentum.

statement-4, since COM is not accelerating, it is moving with constant velocity, so momentum is conserved.

ANSWER- 4

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