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Weird Horse physics problem -help

  • Thread starter bcjochim07
  • Start date
374
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1. Homework Statement
Estimate the maximum speed of a horse. Assume that a horse is 1.8 m tall and .5 m wide.


2. Homework Equations



3. The Attempt at a Solution

This problem is from the work & energy chapter in my book. However, I can't figure out the relevance of the dimensions of the horse. I don't even know where to start. Does this have something to do with horsepower? I'm confused.
 

Answers and Replies

374
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Hmmm... the dimensions probably have to do with the force of drag:

(1/4)(.9 m^2)v^2= Drag

So, the only force acting on the horse is drag:

Drag= (.225)v^2

P= Fvcostheta

So maybe the power of a horse is 1hp? 1hp = 746 W
746W= .225*v^2 * v
746 J/s = .225 v^3
v=14.9 m/s ??????
 
Last edited:

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