Answer:
Step-by-step explanation:
First, you do the standard algorithm, then you have to slove, your answer is 120
a
The work done changes the potential energy
ΔPE = mgΔh = 450(10)(50) = 225,000 = 225 kJ
power is the rate of doing work
P = 225000/5 = 45000 W = 45 kW