nutomaba
contestada

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:

Given parameters:

Work done  = 250000J

Time taken  = 20s

Unknown:

Power of the crane = ?

Solution:

Power is the defined as the rate at which work is being done;

  Mathematically;

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

 insert the parameters and solve;

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

Otras preguntas