Question

If you exert 200 N of force to move a box 8 meters across the living room in 2

seconds, what is your power?

A. 80,000 W

OB. 400 W

C. 1600 W

O D. 800 W

SUBMIT

Answer 1

Answer:

800 W

Explanation:

Power is the rate at which work is done. That is, time taken to do a certain amount of work.

Mathematically, power = work done ÷ time taken

But work done = force × distance/displacement

Then work done = 200 N x 8 m = 1600 Nm = 1600 J (since 1 Nm = 1 J)

So power = 1600 J ÷ 2 s = 800 Js^(-1) = 800 W (since 1 Js^(-1) = 1 W).