Mark correct option . Options: A . &nbspthe negative change in potential energy is equal to work done B . &nbspmechanical energy of a system remains constant C . &nbspif internal force are non conservative the net wor done by internal force must be zero D . &nbspnone of the above

Mark correct option .

Question -

Mark correct option .

Options:

A . the negative change in potential energy is equal to work done

B . mechanical energy of a system remains constant

C . if internal force are non conservative the net wor done by internal force must be zero

D . none of the above

Answer: Option D

(A) This statement is correct only when forces are of conservative nature.

(B) In the absence of non -conservative force mechanical energy and non mechanical energy and non machanical energy are separately constant .

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