![]() ![]() The ball retracesits incident path when it bounces on the right hand side of the table. The two dashed lineson the board are 100 mm apart.Ĭlick the photo to see a fascinating series of bounces of aspinning superball, filmed in slow motion. It then grips the board and rolls over the chalk. ![]() The ball slides at the start of the bounce and sweeps away thechalk. The photo above shows thefootprint of a high speed rubber ball incident from the left on chalk on ablackboard. Rod Cross, Physics Dept, Sydney University Updated June 2014
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