Answer:
208.33 W
141.26626 seconds
Explanation:
E = Energy = [tex]6\times 10^6\ J[/tex]
t = Time taken = 8 h
m = Mass = 2000 kg
g = Acceleration due to gravity = 9.81 m/s²
h = Height of platform = 1.5 m
Power is obtained when we divide energy by time
[tex]P=\frac{E}{t}\\\Rightarrow P=\frac{6\times 10^6}{8\times 60\times 60}\\\Rightarrow P=208.33\ W[/tex]
The average useful power output of the person is 208.33 W
The energy in the next part would be the potential energy
The time taken would be
[tex]t=\frac{E}{P}\\\Rightarrow t=\frac{mgh}{208.33}\\\Rightarrow t=\frac{2000\times 9.81\times 1.5}{208.33}\\\Rightarrow t=141.26626\ s[/tex]
The time taken to lift the load is 141.26626 seconds
