update 4.7.1 to unity5.5.3f,the physics if not the same.when the avator hit the bricks,bricks seems effect too big force than4.7.1,and will lean to fall down…how to fixed this?
By 5.5.3f do you mean 5.5.0p3 (patch #3)?
I only ask because there was a problem where if you were continuously setting the body-type property in script or by setting the legacy IsKinematic property (a bad idea in any setup), it was forcing contacts rather than ignoring the bad behaviour. This was fixed in 5.6.0a6 and backported to 5.5.0p1 (patch #1) via case 835334.
If you’re using 5.5.0p3 then I’m not sure what the difference is. Perhaps you are continuously setting another property of Rigidbody2D that’s doing something similar (causing contacts to be recreated.