Update strech_force.cpp

examples/testbed/tests/table_cloth.h

@@ -35,6 +35,7 @@ public:
 		def.mesh = &m_clothMesh;
 		def.density = 0.2f;
 		def.streching = 10000.0f;
+		def.damping = 100.0f;
 		def.thickness = 0.2f;
 		def.friction = 0.1f;