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: Rotational Inertia Hill Problem

  1. Apr 26, 2010 #1
    A bicycle wheel is rolled down a hill that is 8 m high, Determine the linear speed of the wheel at the bottom of the hill if the wheel is moving initially at .5 m/s

    I= 1/2mr^2


    I know it is set up like a KE equation, and I also know I am missing a variable to solve for on the mgh side. Does anyone know what that variable might be? I know it isn't torque.
  2. jcsd
  3. Apr 26, 2010 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi cnfsdstudent! Welcome to PF! :smile:

    (try using the X2 tag just above the Reply box :wink:)

    You need KE + PE = constant, and also KE = linear KE + rotational KE. :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook