Why isn't there work when carrying something horizontally at a constant speed?

Yes, your lifting force (counteracting g) is perpendicular, but isn't there also a horizontal ... So is pushing a an object at a constant velocity horizontally also 0 work? ... the sandbag is only vertical, but it doesn't move vertically so the work is 0.

Well in order to lose a pound you would have to burn 1,500 calories. the more calories you burn the more weight you lose. in order to lose 2 pounds you would have to run 4 hours and 28 minutes.