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Finding Acceleration

  1. Sep 29, 2012 #1
    1. The problem statement, all variables and given/known data
    A certain Force applied to a particle of m1 gives it an acceleration of 20m/s2. The same Force applied to a particle of m2 gives it an acceleration of 30m/s2. If the two particles are glued together and the same force is applied to the combination, find the acceleration.


    2. Relevant equations
    F=ma


    3. The attempt at a solution
    m2/m1=a2/a1 would be helpful if a mass was given. No idea how to set up this problem.
     
  2. jcsd
  3. Sep 29, 2012 #2

    SammyS

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    Have you learned that acceleration is directly proportional to force, and inversely proportional to mass ?
     
  4. Sep 30, 2012 #3
    Yes, when mass increases, acceleration decreases/Mass decreases, acceleration increases.
     
  5. Sep 30, 2012 #4

    SammyS

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    So, m2/m1=a2/a1 is incorrect.

    Why not use F = ma for each particle:

    The force is the same for each particle. That should give you a correct relation among m2, m1, a2, and a1 .
     
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