Question

A warm hockey puck has a coefficient of restitution of 0.50, while a frozen hockey puck has a coefficient of restitution of only 0.35. In the NHL, the pucks to be used in games are kept frozen. During a game, the referee retrieved a puck from the cooler to restart play but is told by the equipment manager that several warm pucks were just put into the cooler. To check to make sure he has a game ready puck, the referee drops the puck on its side from a height of 2m. How high should the puck bounce if it is a frozen puck?

Answer 1

Solution Given A unim hockey puck hy a oeHiet of egian of o 9o foren hockey puck ha a bemoentof rgHuhor . 35 hence ini ial height h 2m height h no, from deHrihon of Coeticentofeton Ul 0.245 Hena tte f rozen puck hould boune back o- 245m on