1. Not finding help here? Sign up for a free 30min 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!

Equations of motion

  1. Nov 9, 2006 #1
    The problem is to determine the equation of motion for a point particle on which both the gravitational force and a friction force of magnitude
    [tex]|\vec{F}_fr| = k|\vec{v}|[/tex]
    act and to show that when the particle starts at rest, its velocity cannot exceed mg/k.
    I have attached my calculations but something is wrong. The velocity cannot increase when the incline is almost flat..?
     
    Last edited: Nov 9, 2006
  2. jcsd
  3. Nov 9, 2006 #2

    quasar987

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Incline? You can't be on an incline since additionally, there is a normal force. The problem makes no mention of such thing.

    Just solve the equation of motion for F=Fgrav-kv. Plug in the initial value v0=0 and show that v(t) is a monotonous function that converge assymptotically towards mg/k as t-->+infty.
     
  4. Nov 9, 2006 #3
    Of course. Thanks :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Equations of motion
  1. Equation of Motion (Replies: 11)

  2. Equations of motion (Replies: 4)

Loading...