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Physic's equation help (newtons laws)

  1. Oct 25, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the acceleration of a 35 kg block of cement when pulled sideways with a net force of 150 N?


    2. Relevant equations

    what i did was f=ma
    a=m/f

    and just plugged the numbers in

    3. The attempt at a solution

    i got 4.2 but when i entered it into the assignment it told me i was wrong.
    can someone explain to me where i went wrong?
     
  2. jcsd
  3. Oct 25, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    You mean, I hope, a = f/m.
    Probably just a round off error. Redo the calculation more accurately, then round off to two digits.
     
  4. Oct 25, 2009 #3
    i feel so silly
    the answer was 4.3
    i just needed to round up =P
    oh the irony,

    thanks so much for helping!!
     
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