# Flash physics
**URL:** https://forum.kirupa.com/t/flash-physics/108597
**Category:** Uncategorized
**Created:** [April 26, 2004, 10:37pm UTC](https://forum.kirupa.com/t/flash-physics/108597 "2004-04-26T22:37:25Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@dangerskew](https://forum.kirupa.com/u/dangerskew)
#### Post date: [April 26, 2004, 10:37pm UTC](https://forum.kirupa.com/t/flash-physics/108597/1 "2004-04-26T22:37:25Z")
Can anyone tell me how to make a game like the ones with the cannons that you have a velocity and rotation? I tried just to make a simple ball that follows the path of a parabola, using the equation y(I’m assuming this is the mc’s y) = ax^2(Assuming mc’s x) + bx + c. It’s not working.
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### Author:  [@system](https://forum.kirupa.com/u/system)
#### Post date: [June 11, 2004, 8:19pm UTC](https://forum.kirupa.com/t/flash-physics/108597/2 "2004-06-11T20:19:53Z")
Hi I been reading the tutorial, I was wondering how I would make the ball react to walls and floors, like seen a million times before but still new to me, or how to give the gravity an angle (when hitting a wall)or to let the speed you move the mouse letting go of the ball decide how fast it will travel?
sorry know thats a lot, but I understand the code in the tutorial but can’t find the next step to getting a real "interactive " ball …