For gliding motion to occur, two types of friction must be overcome: initial non-moving (static) friction, and moving (kinetic) friction.
The following graphs, excerpted from Volume 1 of The Science of Hockey, show the effect of force on motion of an official hockey puck.
- Describe the magnitude of each force in Graph 1. For what amount of time is each force applied?
- Describe the motion of the puck in Graph 2, using words.
- How far does the puck travel? In what direction?
- Are the graphs coordinated in the time dimension?
The following graphs, excerpted from Volume 1 of The Science of Hockey, compare the force required to move two types of pucks on synthetic ice (HDPE plastic).
- Is the total force different in these two graphs? If so, why?
- Is the initial force different in these two graphs? If so, why?
- What is the average force is applied to each puck?
- Calculate the work involved for each puck.
- Why does the practice hockey puck perform differently on synthetic ice than an official puck? (Hint: The practice hockey puck is normally used on concrete floors.)
Additional free graphs on the science of ice skating are available in a free pamphlet from the publisher's webpage.
The following books from Schottenbauer Publishing contain similar types of graphs and data pertaining to the science of ice skating, figure skating, and hockey:
In addition, the following books are suitable for younger children learning geometry: