Unity Physics bouncy objects sliding along surfaces

Problem

Attched collider 2d script, physical object loose bouncy after few bounce and slide along surface.

It would be easy to understand if you have a look at the video below.

 

 

reproduce project setting

 

 

 

reproduce project setting 

Test project looks like above, has 4 2d box collider and a circle collider which bounces inside a box.

 

 

 

attched script of a circle

The script just give a force on start of the project.

 

 

 

 

Physics Material 2D applied to walls and a circle.

This Physics Material 2D make the circle loose it's force gradually.

 

 

Cause

Theres is a setting in Unity Physics 2D which consider collision to inelastic collision, called velocity threshold.

 

 

 

 

 

Edit > Project Settings > Pysics (2D) > Velocity Threshold

When a collision has lower velocity than the threshold preset. It is considered as an inelastic collision.

 

 

 

Solution

Lower the Velocity Threshold value.

 

 

Result

The circle bounces well though has slow velocity