Calculating Work Done by a Horse Pulling a Wagon with Friction on a Level Road

[gdhillon]

ow much work did a horse do that pulled a 200 kg wagon 80 km along a level road if
the effective coefficient of friction was 0.060?



I used W=Fd to find the work (W=1960*80000=156800000) then I got the force of friction by ff=(coeff)Fn and got (.06)*1960=117.6. I then got the W(friction)=117.6(80000)=-9408000 and by subtracting the 2 Work answers I got 14739200J

 

[Simon Bridge]

Great - did you have a question?
Note: you have an implicit assumption in the calculation that you should make explicit of this is a long-answer.

 

[tim9000]

Sorry, stupid question but how did you know the Force was 1960 N for the 200kg?