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Homework Help: Conserv. of E and Work momentum

  1. Jul 12, 2010 #1
    1. The problem statement, all variables and given/known data

    suppose the rlller coaster in the figure passes point 1 with a speed of 1.70m/s. If the average force of friction is equal to 1/5th of its weight, with what speed will it reach point 2? the distance traveled is 45m.

    2. Relevant equations
    conserv. of E
    and Work

    3. The attempt at a solution
    - i dont know how to do it.
  2. jcsd
  3. Jul 12, 2010 #2
    You start by writing the energy equation.
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