(51) Find the useful power output (in W) of an elevator motor that lifts a 2200 Kg load a height of 450 m in 12.0 5, if it also increases the speed from rest to 4.00 rn/s. Note that the total mass of the counterbalanced system is 10,000 kgso that only 2200 kg is raised in height, but the full 101000 kg is accelerated (Enter a number.) 88 933 33 J W (b) What does it cost (in cents), if electricity is $00900 per kW - h? (Enter a number.) 8 003 X cents