Question

A leaky 10-kg bucket is lifted from the ground to a height of 12 m at a constant speed with a rope that weighs 0.8 kg. Initially the bucket contains 36 kg of water, but the water leaks at a constant rate and finishes draining just as the bucket reaches the 12-m level. How much work is done

Answer 1

The total work done by all forces acting on the bucket is 0 J. The bucket is being raised at a constant speed, so the net force acting on it is ∑ F = 0.