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QUICK calculation help - Why is my equation not giving right answer? Thanks

  1. Oct 13, 2011 #1
    1. The problem statement, all variables and given/known data

    Ok, I am doing a problem where I am finding the acceleration of a mass sliding down a ramp.

    I am now inputting the variables into Newtons 2nd law, and have the correct equation, but its not giving me the right answer. What am I doing wrong.

    Here is the quation: finding acceleration.

    (.2)(9.8ms^2)sin40 - (.1)(1.5N)


    The answer is suppose to be 5.55 m/s^2

    But I am getting 1.10986 ?



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 13, 2011 #2
    divide by .2.
    . Newtons second law states that f=ma. So ure equation is:(.2)(9.8ms^2)sin40 - (.1)(1.5N)=ma, so to find a, you have to divide by .2, which I assume is the mass.
     
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