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: Floating Log

  1. Dec 2, 2006 #1
    1. The problem statement, all variables and given/known data
    When you walk along a floting log in water, why does it move in the opposite direction?

    Is it because of the friction from you walking pushes the log in the opposite direction, or is there something else?
     
  2. jcsd
  3. Dec 2, 2006 #2
    Well obviously there must be some connection, no ?

    You need to investigate a whole lot deeper. Your explaination is not really "what doing physics is all about", wouldn't you say ?

    GENERAL HINTS :

    1) think of conservation of ... (energy, "linear" momentum, etc etc)
    2) what changes in the log's initial state as you walk on it (the answer is in my answer) ?

    marlon
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook