Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(derivative (0.5*80*v(t)^2)) = - v(t)*7200*0.15e-4 + 9.81*80 - 0.5*1.2*1.2*1.8*0.5*v(t)^2, v(0) = 50
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random