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Horse power again

  1. Sep 26, 2008 #1
    horse power

    A horse pulls a cart with a force of 180.0 N at and angle of 26.0o with respect to the horizontal and moves along at a speed of 6.0 km/hr. How much work does the horse do in 11.8 min?

    ok I use the equation Fcos(theta)d=W

    6km/hr=1.67m/s
    11.8min=708s

    so 708*1.67=1182 m 1182m *180N*cos(26)=190904 N*m which is wrong
     
    Last edited: Sep 26, 2008
  2. jcsd
  3. Sep 26, 2008 #2

    LowlyPion

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    Power is watts = N*m/s

    Edit: Oh I see they want work. I was confused by your title.
     
    Last edited: Sep 26, 2008
  4. Sep 26, 2008 #3

    LowlyPion

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    11.8 min is not 720 sec.
     
  5. Sep 26, 2008 #4
    if I use 708 seconds it's still wrong
     
  6. Sep 26, 2008 #5

    LowlyPion

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    I see that it still works out to 1180.

    Perhaps they want the answer in Joules, or KJ
     
  7. Sep 26, 2008 #6
    thanks it was in kJ
     
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