Box b = new Box(Vector3f.ZERO, 1, 1, 1);
Geometry g = new Geometry("b", b);
BoxCollisionShape boxCollisionShape = new BoxCollisionShape(new Vector3f(1, 1, 1));
g.setMaterial(new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md" ));
g.addControl(new RigidBodyControl(boxCollisionShape, 1));
g.getControl(RigidBodyControl.class).setKinematic(true);
bulletAppState.getPhysicsSpace().add(g);
rootNode.attachChild(g);
Geometry g1 = g.clone(false);
g1.addControl(new RigidBodyControl(boxCollisionShape, 1));
g1.getControl(RigidBodyControl.class).setKinematic(true);
bulletAppState.getPhysicsSpace().add(g1);
rootNode.attachChild(g1);
bulletAppState.getPhysicsSpace().enableDebug(assetManager);