Hockey puck

A flat, hard disc made of vulcanized rubber and used as the playing object in ice hockey. Its low profile and dense construction let players slide, pass, and shoot it across the ice.

Vulcanized rubber: Rubber strengthened by heating it with a curing agent, creating cross-links between polymer chains. Vulcanization gives the puck hardness and resilience under repeated stick and board impacts.
Friction: A force that resists relative motion between surfaces in contact. Friction between puck and ice slows its glide and affects how it responds to spin.
Hockey puck specifications: The standardized dimensions and mass requirements used for regulation ice hockey pucks. Regulation specifications keep equipment consistent across organized competition.
FoxTrax: A 1990s television system that tracked an ice hockey puck and highlighted it with colored graphics. The NHL broadcast experiment addressed the difficulty of following a small, fast puck on television.
Ice hockey: A team sport played on ice, in which players use sticks to propel a puck into the opposing goal. The puck is ice hockey’s playing object, shaped for movement across a frozen surface.
Impulse: The change in momentum produced when a force acts over a time interval. A brief stick impact gives the puck the momentum needed for a pass or shot.
Blue puck: A lighter, often larger puck designed to move more slowly for beginner players. Its reduced speed can make puck handling easier for young learners.
Stanley Cup: The championship trophy awarded annually to the National Hockey League playoff winner. The puck is the object played for goals in the competition that awards hockey’s best-known trophy.
Ice: Water in its solid state, forming the low-friction surface used for skating and puck movement. The puck’s sliding behavior depends on the smooth, cold rink surface.
Angular momentum: A measure of rotational motion, determined by an object's mass distribution and angular velocity. Spin can help stabilize a sliding puck and shapes its motion after a shot.

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Jacques PlanteRelated: The puck’s speed and impact made facial protection especially consequential for goalies.