Question on Work done by horse pulling a wagon.

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    Work Work done
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Homework Help Overview

The discussion revolves around calculating the work done by a horse pulling a wagon, focusing on the effects of friction and the correct application of the work formula in a physics context.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are examining the equation for work done, questioning the components of the force calculation, and discussing the relevance of friction in the context of the problem.

Discussion Status

Some participants are providing feedback on the original poster's calculations, suggesting that there may be errors in the formulation of the work equation. There is an ongoing exploration of the correct interpretation of forces involved in the scenario.

Contextual Notes

Participants are addressing potential misunderstandings regarding the application of the work formula and the role of friction in the calculation. There is an acknowledgment of the original poster's confusion about the terms used in the equation.

Daaniyaal
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Homework Statement


How much work did a horse do that pulled a 200-kg wagon 50 km without acceleration along a level road if the effective coefficient of friction was 0.060?


Homework Equations


W=Fnet * d

Force of friction= µmg

The Attempt at a Solution



W=200*9.8-(200*9.8*0.060)*50,000
=92120000


Correct answer is supposed to be 5.9*106
 
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Your equation doesn't make sense. Where did that first term come from? The correct answer should just be the second term with a plus sign. If you recalculate the expression you gave, you will find that you evaluated it incorrectly.

Chet
 
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Hi Daaniyaal! :smile:
Daaniyaal said:
W=200*9.8-(200*9.8*0.060)*50,000

work done is force "dot" displacement

what is the dot product of the vertical weight with the horizontal displacement? :wink:
 
I guess I unnecessarily put in the force needed to move the wagon without friction opposing the movement. Oopsies

:blushing:

I feel embarrassed >.>

Also, thank you :)
 

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