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Newtons 2nd Law - Acceleration Problem

  1. Nov 23, 2013 #1
    1. The problem statement, all variables and given/known data

    Starting from a rest position, how long will it take a 50 kg cyclist riding a 10 kg bike to reach a speed of 4 m/s if the resultant force acting on the bicycle is 48 N?

    2. Relevant equations

    F=ma
    Vf=Vi + at


    3. The attempt at a solution

    F=ma
    (F-48)=(50+10)(a)

    At this point I have to unknowns and one apparent equation.
     
  2. jcsd
  3. Nov 23, 2013 #2

    Doc Al

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    Staff: Mentor

    You are told that the resultant force is 48 N, so why did you write "F - 48"?
     
  4. Nov 23, 2013 #3
    What is your reasoning for the left side of the equation?
     
  5. Nov 23, 2013 #4

    adjacent

    User Avatar
    Gold Member


    The resultant force means the net force.It's not the opposite force
     
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