Question

If conservative and non-conservative forces acts on a body such that they are antiparallel direction and same magnitude. Then is there will be any change in mechanical energy? Please explain.

Answer 1

Answer:

There won't be any change in the mechanical energy as the net force acting on the body is zero in this situation.

What happens here is one force adds energy to the body while the other removes same amount of energy from the body because the forces are of same magnitude.