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Last Cal Thread (trig Is Next)
Good [+1]Toggle ReplyLink» No_Comply a répondu le Wed 29 Oct, 2008 @ 1:05pm |
so,The velocity of a sky diver 't' seconds after jumping is given by: v(t) = 80(1-e^-0.2t). After how many seconds is the velocity 70 ft/s?
so i get: 70 = 80(1-e^-0.2) -1/8 = -e^-0.2t ln1/8 = -0.2t -2.0794 (rounded) = -0.2t t = 10.4 seconds (approx.) This look about right? Flo, lookin in your direction xD | |
I'm feeling gettin more ink soon right now.. |
Good [+1]Toggle ReplyLink» Gamos a répondu le Wed 29 Oct, 2008 @ 3:05pm |
you know, you can just throw the answer you got into the original equation, v(t) = 80(1-e^-0.2t), and see if V(t) = 70 | |
I'm feeling empty right now.. |
Good [+1]Toggle ReplyLink» No_Comply a répondu le Wed 29 Oct, 2008 @ 3:07pm |
yes i know, but its the steps that i want to make sure on as well as the reply. | |
I'm feeling gettin more ink soon right now.. |
Good [+1]Toggle ReplyLink» Gamos a répondu le Wed 29 Oct, 2008 @ 3:13pm |
theres an infinte number of possible wrong answers. Theres only one right answer. So whats the probability you got the right answer by doing the steps wrong? | |
I'm feeling empty right now.. |
Good [+1]Toggle ReplyLink» No_Comply a répondu le Wed 29 Oct, 2008 @ 3:34pm |
go troll elsewhere please. If you're having a bad day, go find someone who cares to hear your rhetorical shit. | |
I'm feeling gettin more ink soon right now.. |
Good [+1]Toggle ReplyLink» Gamos a répondu le Wed 29 Oct, 2008 @ 3:38pm |
Im in a great mood? Is that the way you think of me? As a troll? That actually really kind of hurts...I mean if i was trying to troll, and i got to you, that might be cause for celebration, but i really wasnt trying to. | |
I'm feeling empty right now.. |
Good [+1]Toggle ReplyLink» flo a répondu le Wed 29 Oct, 2008 @ 5:52pm |
yes that's it :) 10.4 seconds, the computation steps are right.
which means in 10 seconds the skydiver already falls down at over 80 kmph ! | |
I'm feeling phd powa !!! right now.. |
Good [+1]Toggle ReplyLink» Screwhead a répondu le Wed 29 Oct, 2008 @ 5:56pm |
Good [+1]Toggle ReplyLink» flo a répondu le Wed 29 Oct, 2008 @ 6:12pm |
Good [+1]Toggle ReplyLink» IMDeadAlready a répondu le Fri 31 Oct, 2008 @ 5:20pm |
70 = 80(1-e^-0.2)
70/80 =1-e^-.2t .875-1 = -e^.2t -.125(-1)=-e^.2t(-1) ln.125 = .2t t = -10.397207708399179641258481821873 i dunno Mise À Jour » IMDeadAlready a écrit sur Fri 31 Oct, 2008 @ 5:23pm whoops overlooked that it was -.2t
I believe you did it right | |
I'm feeling almost scott free right now.. |
Last Cal Thread (trig Is Next)
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