Physics of Ice Hockey Friction
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 Friction is force that happens when two substances are rubbed together. The puck would keep sliding on the ice forever because of Newton's First Law of Motion, but friction acts on the puck causing it to slow down, and eventually stopping. In the NHL, the pucks are required to be frozen before game time, so that the puck would not bounce around as much. When the pucks are frozen, they slide easier on the ice becuase they create less friction. If a regular puck were to slide on the ice, it would be bouncing and have a warmer temperature and wouldn't slide as smoothly as a frozen puck would on a frozen surface. Another example of friction in hockey would be the blades of the skates. The blades of the skate are made thin so that there is a lesser amount of friction. Friction also happens when a player comes to an abrubt stop. The blades of the skates create an angle and lean inward, while the outside of the blade pushes outward, creating a tiny wall. Friction keeps the blade from sliding further than the wall. This is being shown by the player in the picture above.