A 8.2kg box is being lifted by means of a light rope that isthreaded through a single, light, fritionless pulley that is attached to the ceiling.
(a) If the box is being lifted at a constant speed of 2.0 m/s, what is the power delivered by the person pulling on therope?
(b) If the box is lifted at a constant acceleration, from reston the floor to a height of 1.6m above the floor in 0.42s, whataverage power is delivered by the person pulling on the rope?