Comparing Real & Synthetic Ice

Synthetic ice is a popular, low-cost alternative to real ice rinks. Available in several forms and quality levels, synthetic ice usually consists of a slippery plastic surface which mimics the performance of real ice. 

How good is synthetic ice? The following graphs, excerpted from Glide, Spin, & Jump: The Science of Ice Skating: Volume 1: Extended Edition, compare the performance of a sharpened figure skate on real ice and HDPE synthetic ice.

Discussion Questions

1. Compare the force line in each graph, using words. What is one major qualitative difference between the graphs? 
2. In the second graph, what is the minimum force? Is the real force ever less than 0? Why or why not? 
3. Why is force applied before the skate moves? Does this force contribute to velocity? At what point does force contribute to acceleration and velocity? 
4. In the first graph, what is the maximum force? The maximum position? Velocity? Acceleration? 
5. In the second graph, what is the maximum force? The maximum position? Velocity? Acceleration? 
6. In each graph, calculate the range of time in which skate movement occurs. Which is larger?
7. The second graph claims that the skate has been pulled 1 meter. What is the evidence for or against this assertion? (Hint: How long is the skate?) 
8. What force is required to pull the skate 1 meter on synthetic ice? On real ice? Which force is larger?

The following books from Schottenbauer Publishing contain similar types of graphs and data pertaining to the science of ice skating, figure skating, and hockey:

Graphs & Data for Science Lab: Multi-Volume Series

• The Science of Ice Skating 
• Volume 1: Translational Motion
• Volume 2: Rotational Motion (Curves)
• Volume 3: Rotational Motion (Spins)
• Volume 4: Jumps
• Volume 5: Ice Hockey
• Volume 6: Biophysics
• Volume 7: Video Analysis
• Volume 8: Reference Manual
• The Science of Hockey
• Volume 1: Force, Acceleration, & Video Analysis of Pucks & Balls
• Volume 2: Force & Acceleration of Sticks, plus Biophysics
• Volume 3: Video Analysis of Ice, Field, & Street Hockey Sticks

Anthologies of 28 Graphs

• The Science of Figure Skating
• The Science of Ice Hockey
• The Science of Winter Olympic Sports

In addition, the following books are suitable for younger children learning geometry:

Geometry Workbooks

• The Geometry of Figure Skating
• The Geometry of Winter Olympic Sports 

A simple demonstration of one type of synthetic ice is available below, in the YouTube video My First Ice Rink. This synthetic ice consists of High Density Polyethylene (HDPE), one of the least expensive surfaces manufactured in the USA. In fact, 3/16" x 48" x 96" HDPE sheets from US Plastics Corporation sold for approximately $2 per square foot in 2014. 

While high-quality synthetic ice may cost $16 per square foot or more, one variety of Ultra-High Density Polyethlene (UHDPE) is available low-cost from Dezhou Shengtong Rubber & Plastic Co., Ltd. in China. According to price estimates in February 2015, an Olympic-sized synthetic ice rink (100x200 ft, UHDPE with sideboards) is available from China to East Coast USA w/shipping (not including import tax) for only $22,000! 

Additional videos demonstrating HDPE synthetic ice are available on the Skating Science Playlist.

Additional Information

Schottenbauer Publishing

Free Education Resources

Sliding on Ice: The Case of Two Hockey Pucks

The concept of friction is essential to all skating on ice, whether it is for hockey, speed, or figure skating. Ice provides a reduced-friction surface, which allows humans to glide, rather than stick to the floor. Synthetic ice, consisting of slippery plastic, also reduces friction. The friction of synthetic ice can be lowered further by applying soapwater, or other slippery liquids.

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.

Discussion Questions

1. Describe the magnitude of each force in Graph 1. For what amount of time is each force applied?
2. Describe the motion of the puck in Graph 2, using words.
3. How far does the puck travel? In what direction?
4. 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).

Discussion Questions

1. Is the total force different in these two graphs? If so, why?
2. Is the initial force different in these two graphs? If so, why?
3. What is the average force is applied to each puck?
4. Calculate the work involved for each puck.
5. 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:

Graphs & Data for Science Lab: Multi-Volume Series

• The Science of Ice Skating 
• Volume 1: Translational Motion
• Volume 2: Rotational Motion (Curves)
• Volume 3: Rotational Motion (Spins)
• Volume 4: Jumps
• Volume 5: Ice Hockey
• Volume 6: Biophysics
• Volume 7: Video Analysis
• Volume 8: Reference Manual
• The Science of Hockey
• Volume 1: Force, Acceleration, & Video Analysis of Pucks & Balls
• Volume 2: Force & Acceleration of Sticks, plus Biophysics
• Volume 3: Video Analysis of Ice, Field, & Street Hockey Sticks

Anthologies of 28 Graphs

• The Science of Figure Skating
• The Science of Ice Hockey
• The Science of Winter Olympic Sports

In addition, the following books are suitable for younger children learning geometry:

Geometry Workbooks

• The Geometry of Figure Skating
• The Geometry of Winter Olympic Sports 

Additional Information

Schottenbauer Publishing

Free Education Resources

Real Ice Skating Data from Child Double Runner Skates!

Easy access to the science of ice skating is provided by several book series from Schottenbauer Publishing! Books contain graphs, data, and diagrams of ice skating, figure skating, and hockey.

The graphs below are excerpted from Volume 1 of Glide, Spin, & Jump: The Science of Ice Skating, as well as a free pamphlet from the publisher. These graphs show a child's double-runner skate being pulled along a piece of real ice with a force meter, while position, velocity, and acceleration are measured by a motion detector from the back.

Discussion Questions

1. For each graph, describe the motion of the skate in words. 
2. How far does the skate travel in each graph?
3. What is the maximum force on the skate?
4. Is the force on the skate similar to the forces incurred during real skating?
5. From these two graphs, can you determine the mass of the skate?
6. How much physical work is occurs during the movement of the skate? 
7. In which graph is the friction greater?
8. Can the friction be calculated from these graphs?
9. How accurate are these graphs? What is the margin of error, if any?
10. Are these graphs relevant for real skaters? If so, how? 

Additional free graphs 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:

Graphs & Data for Science Lab: Multi-Volume Series

• The Science of Ice Skating, Vol. 1-8
• The Science of Hockey, Vol. 1-3

Anthologies of 28 Graphs

• The Science of Figure Skating
• The Science of Ice Hockey
• The Science of Winter Olympic Sports

In addition, the following books are suitable for younger children learning geometry:

Geometry Workbooks

• The Geometry of Figure Skating
• The Geometry of Winter Olympic Sports 

Additional Information

Schottenbauer Publishing

Free Education Resources