Answer:
Explanation:
The equation for Power is
P = Work/time to do work and the equation for work is
Work = FΔx
We first need to find the amount of work done, then we can find the power it took to do that work.
W = 2000(9.8)(28) so
W = 550,000 N*m
Now we fill that into the power equation:
[tex]P=\frac{550000}{30}[/tex] gives us
P = 18000 Watts. But we need kW, so we divide by 1000 to get
P = 18 kW of power.
Answer:
18.293 kilowatts
Explanation:
Given that, mass (m) = 2000 kg
Height (h) = 28m
Time(t) = 30 seconds
To find: power required in kilowatts
Now required work done will be m*g*h
= 2000*9.8*28=548800 newton
Now power required is given by (P) = work done /(time taken)
= 548800/30 = 18293.333 watts
= (18293.333 / 1000) kilowatts
= 18.293 kilowatts.
