# Physics engine tests?

**URL:** <https://forum.makecode.com/t/physics-engine-tests/509>\
**Category:** Arcade\
**Created:** [September 2, 2019, 11:02pm UTC](https://forum.makecode.com/t/physics-engine-tests/509 "2019-09-02T23:02:15Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![kjw](https://avatars.discourse-cdn.com/v4/letter/k/e79b87/32.png) [@kjw](https://forum.makecode.com/u/kjw)\
**Post date:** [November 26, 2019, 7:17pm UTC](https://forum.makecode.com/t/physics-engine-tests/509/6 "2019-11-26T19:17:04Z")

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More broken/strangeness in [Mega-elastic collisions](https://forum.makecode.com/t/mega-elastic-collisions/815/3). Bouncing off a wall appears to generate extra kinetic energy and sprites with low velocity (0.0–1.0 range) do not move at the set `vx` rate.

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