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!

I Squared Velocity

  1. Apr 1, 2016 #1
    I'm trying to derive an expression for the average drag on an object, which is in the form $$F_d = kv^2.$$ To find the average, I decided to use $$\frac{1}{t_f} \cdot \int_{0}^{t_f} k v^2 \hspace{1mm} dt$$where t_f is the final time. I'm having trouble evaluating this. Can someone give me some insight?
     
  2. jcsd
  3. Apr 2, 2016 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    To find the time average, you need the integrand to be a function of time.
    So you need an expression for v(t) .
     
  4. Apr 2, 2016 #3
    Additional hint, there's a cool equation called
    $$F = m {dv \over dt} ... = -kv^2$$

    Can you solve for v(t) given than equation?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Squared Velocity
Loading...