# Coin Flip physics simulation

**URL:** <https://forum.kirupa.com/t/coin-flip-physics-simulation/171217>\
**Category:** flash\
**Created:** [December 2, 2005, 8:12pm UTC](https://forum.kirupa.com/t/coin-flip-physics-simulation/171217 "2005-12-02T20:12:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![12vUnion](https://avatars.discourse-cdn.com/v4/letter/1/b5ac83/32.png) [@12vUnion](https://forum.kirupa.com/u/12vUnion)\
**Post date:** [December 2, 2005, 8:12pm UTC](https://forum.kirupa.com/t/coin-flip-physics-simulation/171217/1 "2005-12-02T20:12:52Z")

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Hi,  
I’m trying to animate, through math, a coin flipping. I know to make it look like it’s rotating I just change the \_xscale. But I also need to make it look like it’s coming upwards and fall back down (top down view). Where I’m stuck is trying to get the end over end flip to look right with an up and down motion. My trig isn’t that great, so I’d appreciate it if someone sent me in the right direction.