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Cross, Rod; Lindsey, Crawford – Physics Teacher, 2018
An ice hockey player can strike a puck at speeds up to about 45 m/s (100 mph) using a technique known as the slap shot. There is nothing unusual about the speed, since golf balls, tennis balls, and baseballs can also be projected at that speed or even higher. The unusual part is that the player strikes the ice before striking the puck, causing the…
Descriptors: Athletics, Athletes, Physics, Science Experiments
Cross, Rod – Physics Teacher, 2013
A rattleback is a well-known physics toy that has a preferred direction of rotation. If it is spun about a vertical axis in the "wrong" direction, it will slow down, start rocking from end to end, and then spin in the opposite (i.e. preferred) direction. Many articles have been written about rattlebacks. Some are highly mathematical and…
Descriptors: Science Instruction, Physics, Motion, Scientific Concepts