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What is the force of a roller coaster? Please check my work.

  1. Oct 20, 2009 #1
    1. The problem statement, all variables and given/known data
    A rollercoaster car and passengers have a combined mass of 1620 kgm, and they descend the first hill at an angle of 45o to the horizontal. With what force is the roller coaster pulled down the hill?


    2. Relevant equations



    3. The attempt at a solution
    Vertical force = 1620 kg * 9.81 = 15892.2 N
    With a triangle in mind: cos(45) = 15892.2 / x
    x[cos(45)] = 15892.2
    x = 22475 N

    Is this correct?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 20, 2009 #2

    Delphi51

    User Avatar
    Homework Helper

    mg is straight down. Part of that is straight into the track and part is along the track, mg*cos(45). The answer must be smaller than the whole 15892.
     
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