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Newton's Laws homework

  1. Nov 21, 2015 #1
    1. The problem statement, all variables and given/known data A 10g bullet accelerates from rest to 500m/s in a gun barrel of length 10cm. Find the accelerating force (assuming it is constant).


    2. Relevant equations
    F=ma, v^2=vo^2+2a(x-xo)?

    3. The attempt at a solution
    I tried using F=ma, but it does not equal the answer in the back of the book.
     
  2. jcsd
  3. Nov 21, 2015 #2
    Have you converted the mass and length into kg and m? Then rearrange v2=vo2+2ax to find a. Then sub that into F=ma.
     
  4. Nov 21, 2015 #3
    Oh jeez. Got it now, thank you. Gotta make sure I actually pay attention to units :(
     
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