Question

What's the average required power to raise a 150-kg drum to a height of 20 m in a time of 1.0 min? (Answer in kW)

Answer 1

Power required, P = 0.49 kW

Step-by-step explanation:

It is given that,

Mass of drum, m = 150 kg

Height, h = 20 m

Time, t = 1 min = 60 sec

Average power required is given by work done divided by total time taken. It is given by :

`P=(W)/(t)`

W = F.d

Here, W = mgh

So,
`P=(mgh)/(t)`

`P=(150\ kg* 9.8\ m/s^2* 20\ m)/(60\ s)`

P = 490 watts

or P = 0.49 kW

So, the average power required to raise the drum is 0.49 kilo-watts. Hence, this is the required solution.