Question

Robin pushes a wheelbarrow by exerting a
154 N force horizontally. Robin moves it 55 m
at a constant speed for 19 s.
What power does Robin develop?
Answer in units of W.

Answer 1

please note that the speed v of the wheelbarrow is:
\[v=\frac{ 55 }{ 19 }\approx 2.9 m/s\]
Now in order to compute the power P you have to apply this formula:
\[P=F*v\]
where F is your force, namely F=154 Newton.
Your esult will be measured in Watt, since:
\[Watt=1 Newton*1m/\sec\]

Answer 2

thank you

Answer 3

thank you!