1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Determine the Magnitude of the Time Rate of Change of Angular Momentum

  1. May 13, 2013 #1
    1. The problem statement, all variables and given/known data
    In an experiment an individual throws a rock with an initial horizontal velocity of v0 = 20 ft/s at time t=0. The rock is thrown from the edge of a cliff (directly above the base of the cliff) at height h=50 ft from the ground. The origin is assigned at the base of the cliff. Determine the magnitude of the time rate of change of the angular momentum of the rock about O (H'O) at time t = 1 second

    2. Relevant equations

    HO = rXmv

    H'O = MO

    3. The attempt at a solution

    I think that r = 50 ft j

    But how do I find the force from the given velocity?

    Any help would be appreciated.
  2. jcsd
  3. May 14, 2013 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    What force?
    Can you write down equations for the horizontal and vertical speeds at time t?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted