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so if I'm dragging a block attached to a string on a frictional plane at a constant speed is the work done by me really non zero??...(I'm thinking that the force I'm exerting on the block and the frictional force is the same and opposite so the net force is 0 and work done should also be 0.Kindly clarify if there's any misconception.)
what about a car that is being driven on a road at a constant velocity ?...would it's power also be non zero? because the net force on the car would be zero and work should be zero too right?
