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

Could someone help me solve this problem?

  1. Oct 19, 2014 #1
    Your roommate is working on his bicycle and has the bike upside down. He spins the 60-cm-diameter wheel, and you notice that a pebble stuck in the tread goes by four times every second. What is the centripetal force? i know the speed is 7.5 m/s and the equation is a=v^2/r but it keeps on giving me the incorrect answer of 1.875. Help!!
     
  2. jcsd
  3. Oct 19, 2014 #2
    I mean acceleration my b
     
  4. Oct 19, 2014 #3
    Please do not post those sorts of questions in this forum. This section is for introductions only. :)
     
  5. Oct 19, 2014 #4

    Evo

    User Avatar

    Staff: Mentor

    melopelo, please post your homework in the proper homework section.

    Thank you.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook