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Solving for coefficient of friction

  1. Feb 10, 2014 #1

    tep

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    1. a worker can supply a maximum pull of 150 lb on a cart w/c has a handle set at an angle of 40° above the horizontal. what is the coefficient of friction if he can just move a total load of 1500 lb ?



    2. μ = Ff/mg



    3. so i solved it by 150sin(40) divide by 1500cos(40), but i'm not sure if it is correct.... please help :)
     
  2. jcsd
  3. Feb 11, 2014 #2

    Simon Bridge

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    Please show your working and reasoning.
     
  4. Feb 11, 2014 #3

    tep

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    my answer is 0.083 but i'm not sure if its correct.
     
  5. Feb 11, 2014 #4

    Simon Bridge

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    That's answer ... please show your working and your reasoning.
    Without this information I cannot help you properly.
    I don't think you've summed the forces properly but I don't know.

    i.e.: you did: 1500cos(40) - how did you decide to do that? What does that figure represent?
    Did you draw a free-body diagram? What?
     
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