Answers

2015-10-21T16:52:45+05:30
yes, work done by non-conservative forces is always negative because it always opposes the motion it means that it's direction is always -ve.and since work done = Fs and if F is -ve and displacement is s the work done will be in -ve direction.(-ve*+ve= -ve)
           i hope that this will help u...............
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2015-10-21T18:21:52+05:30

yes,work done by a non conservative force is always is negative.
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