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: Terminal speed-Skydiver

  1. Oct 14, 2015 #1
    1. The problem statement, all variables and given/known data
    I attached a screen shot of the problem. Screen Shot 2015-10-14 at 9.40.16 PM.png

    2. Relevant equations
    D= 1/2 C p A v^2
    bv=mg

    3. The attempt at a solution
    I spent 3 long hours on this problem. I confused myself even more. Please help me understand what is going on.
     
  2. jcsd
  3. Oct 15, 2015 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    Please show your best attempt with reasoning.
     
  4. Oct 15, 2015 #3
    I know that at terminal velocity, bv=mg ... so, mg=1/2CpAv^2.. would I just solve for v? .. v=sqrt((2mg)/(CpA))... v=1.38m/s ?
    m: 84kg
    C: 0.8
    p: 1.2kgm^3
    A: 987cm^2
     
  5. Oct 15, 2015 #4

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    That's the right approach, but I don't understand how you get such a small velocity. Did you forget to convert the area to m2?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted