A particle moves from point A to point B subject to a conservative force and a n

Question

A particle moves from point A to point B subject to a conservative force and a nonconservative force. If the nonconservative force does ?100 J of work on the particle as it moves from A to B, what is the mechanical energy at B? (mechanical energy = E = K + U)

A. 200 J smaller than the mechanical energy at A

B. 200 J larger than the mechanical energy at A     

C. 100 J larger than the mechanical energy at A

D. The same as the mechanical energy at A

E. 100 J smaller than the mechanical energy at A

Explanation / Answer

Here the work is done by the non conservation force so the mechanical enery less than the previous point A

because the work done by a non conservation force energy will be loss

so the answeris

E. 100 J smaller than the mechanical energy at A

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