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.
(( ( 0.5*(7km/s) ^2 * 3 metric tons ) - ( 0.5*(4km/s)^2 * 3 metric tons )) ) / 4 minutes
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random