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Physics coefficient of friction question

  1. Jun 17, 2013 #1
    Physics coefficient of friction question!!!

    A 17kg box is being pushed by a 150N force. If the box is accelerating at 2.3m/s2. What is the coefficient of friction on the ground?


    FNet=μFn



    Fn= 9.8x17= 166.6N
    How can I find the fnet?
     
    Last edited: Jun 17, 2013
  2. jcsd
  3. Jun 17, 2013 #2
    Hi Jasmin99. Welcome to PF.

    You should read the how to ask for help forum. Will you specify where you are having problem?.
     
  4. Jun 17, 2013 #3
    Sorry! I'm not sure how to find the Fnet.
     
  5. Jun 17, 2013 #4
    Okay. Can you draw the FBD of the object?
     
  6. Jun 17, 2013 #5
    Here is my work:
    Fnet= 150-(17)(2.3)
    Fnet= 110.9N
    Fnet=uFn
    110.9=u166.6
    U=0.66
    Not sure if I did it right.
     
  7. Jun 17, 2013 #6

    462chevelle

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  8. Jun 17, 2013 #7
    The answer looks correct
     
  9. Jun 17, 2013 #8
    Thanks for the help everyone! I have figured it out now.
     
  10. Jun 17, 2013 #9
    Yup, you've got it right. Make sure you post your attempt at the time of asking the question itself.
     
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