how to keep a part of mesh object fixed where the other end is rotating?

hello all,

I am New to blender SO please bear with me while i explain

I have a bent long cube with rotation in animation using rigid body. Have a Plane that collides with curved part at one end.

But i want to keep the other end anchored so that it does not move once the collision takes place.

on collision the other end moves while i need it to be stuck at its place.

How do i keep the other end fixed to its position.

TIA
suhashgde

Moved from “General Forums > Blender and CG Discussions” to “Support > Particles and Physics Simulations”