Ok, lets say we have a bowling ball or a round weight of 10 pounds and have it roll down hill on a half tube that is 5 ft long with a 45 degree slope and at the end of the tube there is a stopping point or catching point. At the end where the ball stops a small portion of the tube can slide forward on bearings. The small portion of the tube can slide forward by gravity but is held in place by 40 pounds of pressure held by a 1 inch bar laying on the edge of the tube. Question: Can the impact of the 10 pound ball slide the tube forward with 40 pounds of pressure applied to the edge of the tube? If so, will it slide forward enough to release the 40 pounds of pressure if slide forward 1 1/2 inch's ?