1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Normal force on top of a loop?

  1. Feb 5, 2012 #1
    Say we have a roller coaster, and we want to calculate the speed the roller coaster can go at barely making the loop. Normally, the equation would be n+w=m*v^2/r, but why do we set normal equal to zero when we're solving for the minimum speed? Where does the normal come from on top of the roller coaster anyway? Thank you all so much.
     
  2. jcsd
  3. Feb 5, 2012 #2
    Hhhmmm...I am not sure I am following, but it seems to me that you already answered your own question.

    What does the normal come from? It doesn't...that's why you set the normal to zero in the equation that you are solving, because if you want to calculate the point at which the roller coaster just makes it...well, at the point the coaster is "floating" and vertically stationary in midair as it is stopping from going up and getting ready to start coming down...

    do I make sense?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Normal force on top of a loop?
  1. Normal force (Replies: 2)

  2. Normal force (Replies: 1)

  3. Normal Force ? (Replies: 5)

Loading...