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!

Motion described with differential equation

  1. May 6, 2014 #1
    1. http://i.imgur.com/3xya7IM.jpg

    3. I curently do not understand how to jump to finding an acceleration due to gravity (in those terms asked) from the differential equations
  2. jcsd
  3. May 6, 2014 #2


    User Avatar
    Gold Member

    From the up eq, you can find its time (depending on g)... and for the down, you can do the same...
    then you can solve for g since you know their summation...
  4. May 6, 2014 #3


    User Avatar
    Science Advisor

    From [itex]dv/dt= -mg- kv[/itex] you can get
    [tex]\frac{dv}{mg+ kv}= -dt[/tex]
    Integrate both sides.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted