The hockey player hit the shot 17.6 m from tK goalie. Neglecting any de-accelrat

Question

The hockey player hit the shot 17.6 m from tK goalie. Neglecting any de-accelration (that was just for the physics pholks out there) how many seconds did it take for the puck to reach the goalie? distance =vxt We have computed the kinetic energy of the puck. The goalie is from Finland-the best goalies in the world-and he catches the puck in his glove. The glove stops the puck .02 meters. That's the thickness of the glove. With what force did the golaie put on the puck to stop it? F x d = KE. Solve for F It's HUGE!!! Those are some Newtons

Explanation / Answer

12) Using v = 47.22 m/s (Max speed for a puck)

t = distance / velocity = 17.6 m / 47.22 m/s = 0.37 s

13) Calculating Ke (usin m = 0.17 Kg, which is the max. mass for a puck)

Ke = .5*(m)(v)2 = .5*(0.17 Kg)(47.22 m/s)2 = 189.53 J

W = F. d = .5*(m)(vf)2 - .5*(m)(vi)2

F . d = 189.53 J - 0

F = 189.53 J / 0.02 m = 9476.35 N

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