Answer:
4950W
Step-by-step explanation:
Given parameters:
Height = 100m
Time = 20s
Weight = 990N
Unknown:
Power = ?
Solution:
Power is the rate at which work is done.
Power =

Workdone = Force x distance
Input the parameter and solve for the workdone;
Workdone = 990 x 100 = 99000J
Now;
Power =
= 4950W