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: Momentum problem

  1. Oct 30, 2004 #1
    A 3kg puck revolves in a circle on a frictionless table at the end of a 50cm long string. The puck's angular momentum is 3kg (m^2/s). What is the tension in the string?

    Need help in starting this problem
  2. jcsd
  3. Oct 30, 2004 #2
    Knowing the angular momentum what can you find? How does this relate to force or tension?
  4. Oct 30, 2004 #3
    L= mrv
    3kg*.25m*v = 3kgm^2/2
    (3kg*16m/s)/(.25m) = 192N

    is this right?
    Last edited: Oct 31, 2004
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook