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• 11:21, 6 April 2022 Physdemo talk contribs created page Happy and Sad Balls (Created page with "{{NewDemo|subject=Mechanics|topic=Impulse and Linear Momentum|file1=Happy_and_Sad_Balls.gif}} Two apparently identical rubber balls. However one has a very low coefficient of restitution giving it no bounce. '''Location:''' * Dr. 8")