Question

Sam did 480 J of work when moving a bag with a mass of 38 kg. He did the work in 4 minutes. What was the power output?

A.442 W
B.20 W
C.120 W
D.2 W

Answer 1

I got c I'm not sure tho

Answer 2

Option D is the correct answer.

Explanation:

We have expression for power,

`\texttt{Power}=\frac{\texttt{Work}}{\texttt{Time}}`

Work done, W = 480 J

Time taken, t = 4 minutes = 4 x 60 = 240 seconds.

`\texttt{Power}=\frac{\texttt{Work}}{\texttt{Time}}=(480)/(240)=2W`

Option D is the correct answer.