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Forces And Newtons Second Law

  1. Oct 4, 2014 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution

    I'm not sure if their are frictional forces on the cart and the mass m. Also do I have to somehow get the length of the bar involved ?, not sure how to do that. Also is their a tension acting on the bar ?
  2. jcsd
  3. Oct 4, 2014 #2


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    It really does not matter if there are frictional forces on the cart since we have been told that it is accelerating at 2 m/s^2. This must mean that the net force, including frictional forces, gives it that acceleration.

    Yes, there will be a tension in the bar - the tension will be necessary to accelerate the particle and keep it from falling.
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