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Newton's Laws

  1. Nov 15, 2015 #1
    1. The problem statement, all variables and given/known data

    A body of mass 35kg moving with velocity Vox=40m/s is subjected to a constant Force of 55N acting in the same direction.How long does it take the speed to increase twice?
    2. Relevant equations
    I would be grateful if anyone could give me hand to solove it after i find the acceleration a= F/m....

    3. The attempt at a solution
     
  2. jcsd
  3. Nov 15, 2015 #2

    haruspex

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    I assume it means, how long does it take for the speed to double.
    Are you familiar with the SUVAT equations?
     
  4. Nov 15, 2015 #3
    I am to the most of them.... Still I don't know which one to use. Could you give me a hand here?
     
  5. Nov 15, 2015 #4

    haruspex

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    In the usual form, there are five variables and five equations. Each equation involves a different four of the variables. Typically, you know three values and wish to find a fourth. So pick the equation involving those four.
     
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