Provides a frictionless surface that is an indispensable tool for studying the mechanics of linear motion. By measuring velocity in 1 dimension, students can investigate acceleration, collisions, explosions, momentum, and simple harmonic motion. Unit has a built-in air source; a sturdy 6-ft anodized track with large, easy-to-read metric scale on 1 side; an air adjuster; and 3 leveler feet. Includes a complete set of gliders and accessories and detailed manual. Available in 115-V AC and 220-V AC versions.