Hi, i was just wondering with this question because i'm unsure if im supposed to add both kinetic and gravitation energy into this answer? thanks. 1 A crane on a building site lifts an 8.00 × 102 kg load from ground level to a vertical height of 90.0 m at a constant speed of 2.00 m s–1. Ignore the mass of the cable. A. How much work is done by the crane in lifting the load through this distance? m = 800kg h = 90m g = 9.8ms^-2 E = mgh E = 800*9.8*90 = 7.056*10^5 J Sirsh.