Q 6.13: Two objects interact with each other and with no other objects. Initiall

Question

Q 6.13: Two objects interact with each other and with no other objects. Initially object A has a speed of 7 ms/ and object B has a speed of 6 ms/ . In the course of their motion, they return to their initial positions. Then A has a speed of 4 ms/ and B has a speed of 3 ms/ . We can conclude (select all that apply)

A : Mechanical energy was decreased by nonconservative forces.

B : Mechanical energy was increased by nonconservative forces.

C : Mechanical energy was decreased by conservative forces.

D : The potential energy is unchanged from the beginning to the end of the trip.

E : Mechanical energy was increased by conservative forces.

Explanation / Answer

here speed is reduces by friction force those are called as nonconservative force

hence OPTION A is right answer

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