An elevator with a total mass of 1500 kg is pulled upward using a cable (see Anim. 0-4-2) at a velocity of 5 m/s through a height of 300 m.
(a) Determine the rate at which is work is transferred into the elevator(magnitude only, no sign).
(b) What is the sign of W? Enter -1 (negative) or 1 (positive).
(c) The change in stored E of the elevator assuming the KE and U to remain unchanged.