When a body say a toy car slides down an inclined plane with angle of inclination less than 45 degree the downward and forward motion of the toy car can be restricted without extra tension by a thread or support perfectly parallel to the horizontal .This enables construction of a plane solid surface where an object can rest with part of it's weight unsupported even at the position of rest as described mathematically in preprint manuscript 10.5281/zenodo.439108.