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Homework Help: How fast will a car be moving at a certain point?

  1. Mar 15, 2005 #1
    I have a problem I'm trying to figure out. To see the problem and picture, please go to problem #10 at this site: http://www.compadre.org/psrc/evals/IPO_2003_Multiple_Choice.pdf.

    The problem says, A roller coaster car moves along a track as shown. At point A, the car is moving with a speed of 10 m/s. If friction is negligible, about how fast would the car be moving at point B?

    If you don't have PDF, I'll try to explain the scenario:

    The car is at Point A, which is 50 m above the ground. It is traveling at 10 m/s.

    Then the rollercoaster curves downwards to an un-named point which is 10 m above the ground.

    From that point, it curves upwards to point B which is 30 m above the ground.
  2. jcsd
  3. Mar 15, 2005 #2


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    HINT:Apply the law of conservation of total mechanical energy.

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