Question

A man pulls a bucket of water mass 10kg from well 5n deep in 5sec. Calculate the power of the man

Answer 1

Mass,m = 10kg

Height,h = 5m

Time,t = 5sec

g = 9.8m/s^2

Work done by man to pull the bucket,W =mgh

Power= W/t = mgh/t = 10*9.8*5/5

=98W

Answer 2

The power of the man is 98 watts

Explanation:

Given that,

Mass of the bucket, m = 10 kg

The bucket is pulled from a height of 5 meters in 5 seconds.

To find,

the power of the man.

Solution,

The work done per unit time of an object is called its power. It is given by :

$P=\dfrac{W}{t}$

W = mgh

$P=\dfrac{mgh}{t}$

$P=\dfrac{10\times 9.8\times 5}{5}$

P = 98 watts

So, the power of the man is 98 watts.

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