Skating

Skating is one of the most fundamental aspects of hockey.  Without skating, there is no way you  can be a professional  hockey player. The physics of ice skating is actually quite  interesting. There are two basic contacts between the skate and  the ice during the process of skating. One is the skate blade  gliding over the ice. The other is the edge of the blade grabbing the ice, creating friction to provide movement. According to   engineering tool box, the coefficient of friction for ice against  steel is .03, which is very low. This, of course, is when the  skate blade is not intentionally grabbing the ice.

http://giphy.com/gifs/hockey-ice-skating-o2mLdAbLN8Mr6

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When a skate is pushing off, it is at an angle of the way the player is  skating. The greater the skater increases the angle "a" (see right), the more   force that is applied in the forward direction. According to Real World  Physics Problems,             "As the skater pushes off with his rear leg, a perpendicular force F is  exerted on the skate by the ice. The component of the force F that points  forward (in the direction of motion) is what pushes the skater forward. At the  same time, his other skate is either raised or gliding on the ice. As the skater  moves forward he then switches to the other leg and pushes off the ice with  that one, and the process is mirrored. To push off the ice with greater forward  force (and accelerate faster), the skater increases the angle α, which  increases the component of force in the direction of motion."       The foot that is not pushing is placed on the ice, and used to direct the  forward motion. The speed a skater can achieve depends on a lot of things   such as the power of the push, the technique of the push, and the speed of the  stride.

http://www.real-world-physics-problems.com/physics-of-ice-skating.html

http://howtohockey.com/how-to-ice-skate