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!

Speed and distance problem

  1. Sep 30, 2009 #1
    1. The problem statement, all variables and given/known data

    If a salmon swims straight upward in the water fast enough to break through the surface at a speed of 5m/s, how high can it jump above the water?

    2. Relevant equations
    I am not sure which equation to use.

    3. The attempt at a solution

    0 + 5/2 = 2.5m ??

    Is this correct? If not, which equation do I have to use?
     
  2. jcsd
  3. Sep 30, 2009 #2
    I would use the energy principle. When it breaks through the water it has only kinetic energy E=1/2*mv2. At it's highest point it has only potential energy E=mgh (where h is the height, I'm not really sure if h is used worldwide or if it's just here in Finland). This gives you an equation system.
     
  4. Sep 30, 2009 #3

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi mkerikss! Welcome to PF! :smile:

    Yes, I think h is height everywhere that has an h. :biggrin:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Speed and distance problem
  1. Distance/speed problem (Replies: 2)

Loading...