Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Centripetal Motion on a Semi-Rollercoaster

  1. Feb 21, 2010 #1
    I am doing an analysis on a roller coaster that is represented on the diagram attached.

    However, I am having trouble analysing the curve. The radius is 36.9m and it is 160km/hr going up and then it free falls back down from 115m for about three seconds.
    When I am going up do I just use a_centripetal = v^2/r to find the acceleration?
    When I am going down, I have to find the acceleration as well as the velocity, but how do I know where to start?
    Last edited by a moderator: Apr 24, 2017
  2. jcsd
  3. Feb 21, 2010 #2
    u know the figure look like a function f(x)=exp(-x).
    the above function mean that "x" is linear and than it decay exponentially as u can see in ur figure.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook