On the far north-east coast of Australia there is a rock-covered beach known as Bouncing Rock Beach. Many of the rocks are smooth and about the size of tennis balls.It is a fascinating past-time to pick up one of these and drop it on one of the larger ones, whereupon it will bounce off in a random direction, and may keep on bouncing on other rocks, sometimes for as long as 10 or 15 seconds. If it happens to hit 'just right', it may even bounce higher than its starting point.What is happening here?
Bernard SpeightBrisbaneQueensland Australia
