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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)

Respuesta :

Answer:

Power required, P = 0.49 kW

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 :

[tex]P=\dfrac{W}{t}[/tex]

W = F.d

Here, W = mgh

So, [tex]P=\dfrac{mgh}{t}[/tex]

[tex]P=\dfrac{150\ kg\times 9.8\ m/s^2\times 20\ m}{60\ s}[/tex]

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.

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