Which of the following statements about momentum and kinetic energy in a collision is TRUE?

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Momentum and kinetic energy are both conserved in an elastic collision; but neither are conserved in an inelastic collision.

Kinetic energy is always conserved in any collision, but momentum is only conserved in an elastic collsion.

Kinetic energy is always conserved in any collision, but momentum is only conserved in an inelastic collision

Momentum and kinetic energy are both always conserved in any collision

Your Answer

Momentum is always conserved in any collsion, but kinetic energy is only conserved in an inelastic collision.

Momentum is always conserved in any collision, but kinetic energy is only conserved in an elastic colision.

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Question 3

(1 points)

Complete the following sentence with the best selection of word(s) choices below:

” In an elastic collision, if two objects were initially moving towards each other at a particular rate, then after they collide they will be moving apart from each other at that same rate.” . This statement is most accurately described as a direct interpretation of _ (i) _ .

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the principle of conservation of energy

the relative velocity equation

the generalized work-energy theorem

the impulse-momentum theorem

the principle of conservation of momentum

the principle of independence of orthogonal motion

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Question 4

(1 points)

Which of the following statements about center of mass are true?

(i) an isolated object, if set in rotation, will rotate about its center of mass.

(ii) for an object of uniform material, the center of mass will be at its geometric center.

(iii) the center of mass of an object is the point at which the mass is symmetrically distributed in any dimension.

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Only statements (ii) and (iii) are true

Only statements (i) and (ii) are true

All of the statements are true

Only statement (ii) is true

Only statement (i) is true

Only statements (i) and (iii) are true

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