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Normal force direction

  1. Dec 14, 2004 #1
    Hi I have to draw a freebody diagram for FN (normal force) of an object at different locations on my rollercoaster.

    Where would FN be located when the object is upside down (going through a loop) .... would it just be straight down? (like gravity) ? Because FN is always perpendicular to the surface, so when the object is at the top of a loop on my roller coaster, FN would be straight down wouldn't it? And Ff would be straight up? And gravity is always down...........
  2. jcsd
  3. Dec 14, 2004 #2
  4. Dec 14, 2004 #3
    Oh my god.... thank you soooooooooo much
  5. Dec 14, 2004 #4
    You are welcome :-D Sometimes google gives pretty good answers too, but it helps to know what to look for.
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