Did you know that elastic force of a rubber band doesn't follow patterns? I did. My class and I did an expirment to measure the elastic force of a rubber band. We measured it in Newtons! If a rubberband is stretched 2 cm, it has the elastic force of 1 Newton. If you pull a rubberband back it can pull a certain amount of elastic force (measured in Newtons of cource) If you accidently let go of the rubberband, it will snap forward because the elastic force is being forced to be pulled back. If you pull to hard, the rubberband can break because the length the band is pulled can be too much to handle. In some cases it makes the rubberband extremely weak because it was stretched too much.