Randy does 200 newton-meters of work moving a 100 pound piano a distance of 5 meters. How much force did he use?

40 newton-meters
500 newton-meters
1,000 newton-meters
20,000 newton-meters

Question

Randy does 200 newton-meters of work moving a 100 pound piano a distance of 5 meters. How much force did he use?

40 newton-meters
500 newton-meters
1,000 newton-meters
20,000 newton-meters

whpalmer4 · Answer

$$W=Fx$$ where $W$ is work, $F$ is force, $x$ is distance.

mrnood · Answer

None of those answers is correct.
It asks for th eforce used - but the answers are in Newton metres.
Force is measured in Newtons

The mass of the piano (100lb) is not relevant

As given above Work = F*d

you are given 
W= 200Nm
d = 5m

So oyu can work out the Force in Newtons - however the answer options are NOT correct so you cannot give a correct answer if this is multichoice - the answer has unite Newtons - NOT Nm

whpalmer4 · Answer

Or you could assume that the problem's author intended to use the proper units, which would yield a correct answer option, as "none of the above" is not an answer choice either :-)