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Homework Help: Moving train - kinematics problem

  1. Jun 6, 2010 #1
    1. The problem statement, all variables and given/known data

    A 12 metrick ton train is moving with a 72KMH velocity.when brakes It comes to rest in 2 mins.find the force caused by the force?

    2. Relevant equations
    F=ma
    a=v/t


    3. The attempt at a solution
    didn't get the correct answer which is given on the answers page(only the answer not the steps)
     
  2. jcsd
  3. Jun 6, 2010 #2

    Lok

    User Avatar

    Re: Kinematics

    The steps are:

    1) Transform everything in kg, m/s, s.
    2) Find deceleration of train with equation 2 (assuming it is constant)
    3) hopefully equation 1 will be all that is needed as your final question could use some work.
     
  4. Jun 7, 2010 #3
    Re: Kinematics

    thank you....
     
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