# Need help - Math calculation!

**URL:** <https://forum.kirupa.com/t/need-help-math-calculation/322709>\
**Category:** Uncategorized\
**Created:** [May 31, 2011, 1:01pm UTC](https://forum.kirupa.com/t/need-help-math-calculation/322709 "2011-05-31T13:01:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![karthic\_vkn](https://avatars.discourse-cdn.com/v4/letter/k/da6949/32.png) [@karthic\_vkn](https://forum.kirupa.com/u/karthic_vkn)\
**Post date:** [May 31, 2011, 1:01pm UTC](https://forum.kirupa.com/t/need-help-math-calculation/322709/1 "2011-05-31T13:01:18Z")

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Dear All,

I am trying to animate a circle from a position to another, but the speed is like “easeIn” twining animation. The moving speed start high and ending a smooth slow animation like easing. I know It can be done thru easing. but its not helping to my animation which i am doing currently. So pls someone help to do this by “EnterFrame” event.

Circle starting position : 10 px  
Cricle Ending position : 500 px  
Starting Speed : 20px /per sec  
Ending Speed : 1 px / per sec

So what will be the speed in middle of somewhere ?

Thanks,  
Karthikeyan