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Calculating speed with mass and final velocity

  1. Dec 7, 2014 #1
    1. The problem statement, all variables and given/known data
    a cart, with a mass of 1 kg, on an air track is pushed from rest, for a certain length in time (5 seconds) until it reaches a speed of 3 m/s

    what speed will a cart of mass 2kg reach when pushed with the same force for the same time?

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Dec 7, 2014 #2
    is there a specif equation for this or is it just half the final velocity because its twice as heavy?
     
  4. Dec 7, 2014 #3

    haruspex

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    It isn't quite that simple. In this question, the forces are the same in the two cases and the times are the same. If it had been same forces and same distances the result would be different
    If a force acts for a certain time, what physical quantity does that make you think of? If that doesn't help, just apply the standard SUVAT equations.
     
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