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: Motion in a vertical circle

  1. Sep 24, 2007 #1
    Hey, Simply I want to figure out what produces the reaction force, in this picture i drew, a reaction force appears directing in the same direction as the weight force, any ideas why? Sorry for the bad drawing :yuck:

    The example shows a cyclist going around a loop (upsidedown)
     

    Attached Files:

  2. jcsd
  3. Sep 24, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    The track exerts a force on the bike.
     
  4. Sep 24, 2007 #3
    Oh... its that simple... sorry haha
     
  5. Sep 24, 2007 #4

    Astronuc

    User Avatar
    Staff Emeritus
    Science Advisor

  6. Sep 24, 2007 #5

    Doc Al

    User Avatar

    Staff: Mentor

    Yep. The combination of the force of the track and the weight of the bike create the centripetal force that keeps it going in a circle.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook