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A crane used 250,000 Joules of work to move a beam to the top of a building in 20 seconds. How much power did the crane use?

a) 5,000,000 W
b) 5,000 W
c) 50 J
d) 12,500 W

Respuesta :

quasarJose

Answer:

12500W

Explanation:

Power is the rate at which work is done. It is given mathematically as:

       Power = [tex]\frac{work done }{time taken}[/tex]  

Given parameters:

Work done  = 250000J

Time taken = 20s

  Now, insert the parameters and solve for power

   Power  = [tex]\frac{250000}{20}[/tex]   = 12500W

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