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: Mechanics prove 2

  1. Jun 3, 2010 #1
    1. The problem statement, all variables and given/known data

    A particle with mass m is projected vertically upwards from a point with speed u. THe particle, besides being subjected to gravity, experiences a resistive force of magnitude
    mkv^2, with v as its velocity when its height from the point of projection is x and k as a positive constant. Show that


    2. Relevant equations

    3. The attempt at a solution


    using v^2=u^2+2as


    thats all i can get
  2. jcsd
  3. Jun 3, 2010 #2
    Did you know that the equation v^2 = u^2 + 2as only holds for constant acceleration? You will have to integrate in this case due to the varying acceleration.
  4. Jun 3, 2010 #3
    thanks , for this , do i integrate

    F-mkv-mg=ma ?

    am i supposed to get rid of some of the terms here first before i integrate ?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook