Question

A crane lifts a mass of 100kg to a height of 10m in 20 sec . The power of crane is

Answer 1

Answer:

Explanation:

energy/time=mgh/t

=100*10*10/20

=10000/20

=500 kg m^2 / sec^3

Answer 2

The power of the crane is 500 watts.

Explanation:

Given that,

Mass of the crane, m = 100 kg

Height, h = 10 m

Time, t = 20 s

We need to find the power of crane. We know that the power of an object is equal to the work done per unit time. It is given by :

$P=\dfrac{mgh}{t}\\\\P=\dfrac{100\times 10\times 10}{20}\\\\P=500\ W$

So, the power of the crane is 500 watts. Hence, this is the required solution.

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