# Chapter 15. Back motion not working

**URL:** <https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033>\
**Category:** 3D iOS Games by Tutorials\
**Created:** [January 5, 2019, 11:59am UTC](https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033 "2019-01-05T11:59:44Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sergeydi](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/sergeydi/32/81494_2.png) [@sergeydi](https://forums.kodeco.com/u/sergeydi)\
**Post date:** [January 5, 2019, 11:59am UTC](https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033/1 "2019-01-05T11:59:44Z")

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Hi,

After completing “Motion control” on Chapter 15:  
«you can control the ball simply by tilting the device **left, right, forward and back**.»

In my case works only left, right and forward motion. When I move phone back, ball stay on the place without any movement. Is it correct?

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**Author:** ![shogunkaramazov](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/shogunkaramazov/32/108826_2.png) [@shogunkaramazov](https://forums.kodeco.com/u/shogunkaramazov)\
**Post date:** [January 5, 2019, 12:45pm UTC](https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033/2 "2019-01-05T12:45:46Z")

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@chrislanguage Can you please help with this when you get a chance? Thank you - much appreciated! :]

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<div class="post-metadata">

**Author:** ![sergeydi](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/sergeydi/32/81494_2.png) [@sergeydi](https://forums.kodeco.com/u/sergeydi)\
**Post date:** [January 5, 2019, 3:19pm UTC](https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033/3 "2019-01-05T15:19:59Z")

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I founded why issue happens. In Xcode 10.1 if for sphere node you set **Physics shape Type** to **Bounding Box** and then return to **Convex** , the Ball node physics will take shape as on Screenshot…  
 ![ballIssue](https://files.chunter.kodeco.com/original/3X/2/b/2b2dcfbdf538407ccd10e1dffdf4c1a1a8e82306.jpeg)

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<div class="post-metadata">

**Author:** ![shogunkaramazov](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/shogunkaramazov/32/108826_2.png) [@shogunkaramazov](https://forums.kodeco.com/u/shogunkaramazov)\
**Post date:** [January 5, 2019, 3:37pm UTC](https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033/4 "2019-01-05T15:37:15Z")

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@sergeydi Glad you sorted it out! Cheers! :]

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<div class="post-metadata">

**Author:** ![system](https://s3.amazonaws.com/cdn.raywenderlich.com/community/forum-assets/noun-game-ghost-878668.png) [@system](https://forums.kodeco.com/u/system)\
**Post date:** [June 21, 2019, 3:59am UTC](https://forums.kodeco.com/t/chapter-15-back-motion-not-working/59033/5 "2019-06-21T03:59:46Z")

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Closed on June 21, 2019, 3:59am UTC

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