1. Not finding help here? Sign up for a free 30min 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!

A point on the rim of a 0.30-m-radius rotating

  1. Dec 8, 2008 #1
    A point on the rim of a 0.30-m-radius rotating wheel has a tangential speed of 4.0 m/s. What is the tangential speed of a point 0.20 m from the center of the same wheel?

    a. 1.0 m/s
    b. 1.3 m/s
    c. 2.7 m/s
    d. 8.0 m/s

    i have been trying to do this for hours now.somebody please help
     
  2. jcsd
  3. Dec 8, 2008 #2

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    What formula do you know that relates tangential speed to radius?
     
  4. Dec 8, 2008 #3
    can anyone help me?
     
  5. Dec 8, 2008 #4

    CompuChip

    User Avatar
    Science Advisor
    Homework Helper

    Please read this first. Then, you might want to answer that question. The solution immediately follows (i.e. I cannot make it any easier for you without giving the answer).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?