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It takes 8 seconds for a pulley system to lift a load that weights 400N to a height of 10 m. How much power is required?.

A. 400 watts.

B. 3200 Watts.

C. 500 watts.

D. 80 watts

Respuesta :

Hania12

Answer:

C. 500 watts

Explanation:

power is defined as the rate of work done

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

When a force causes a object to move, work is being done on the object by the force.

[tex]work.done=force*displacement\\=400*10\\=4000J[/tex]

[tex]power=\frac{4000J}{8s}\\=500 W[/tex]

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