Click here to download the catalog as a PDF file. To view this site you need Adobe Flash Player and your browser must allow javaScripts. Go here to get the latest Flash Player. Classroom Kit includes: 12 Trebuchet kits 12 construction manuals 12 bottles of glue 12 glue applicators 12 packets of rubber bands Force & Motion Elasti-Launcher! Consistently fun and predictably consistent! The Elasti-Launcher (below left) is the perfect tool when it comes to collecting data for the study of projectile motion. Best of all, it’s safe to use indoors or outdoors because, unlike conventional rockets, it’s powered by rubber bands. Launch tiny rockets (projectiles) made from lightweight plastic, or make your own. You control the launch angle, force and mass. The amazingly consistent results of repeat launches allow students to truly practice the scientific method by collecting tons of accurate data in a short amount of time. It’s so simple to use, 1st graders can operate it and learn how to predict where the rocket will land. Yet it’s so versatile, it can be used at high school and college levels to teach advanced concepts. Includes 2 projectiles. P4-1963 Elasti-Launcher Set $129 P4-1963-01 Spare Projectile $2.50 ea. Photo shows included items for a single Trebuchet. State-of-the-Art Medieval Technology The desktop Trebuchet provides a fun and exciting environment for studying energy conservation, levers, trajectories, inertia, forces, and more! Powered by gravitational potential energy, this easy-toassemble kit provides hands-on, practical building experience while fueling imagination with history and science. Investigate how projectile range is affected by weight, weight position, sling length, pivot point, and projectile mass. Each kit includes assembly instructions and internet resource materials that provide investigations into the theory of operation, mathematical modeling, history, and more! Finished frame is 12" high and requires assembly. Visit us on the web to see a video of the Trebuchet! P4-1960 Trebuchet P4-1961 Trebuchet Classroom Kit $14.95 $179 Use the supplied projectiles or make your own! Experiment with different shapes and masses. Perfect as an introduction to projectile motion. Students can design, test and experience the results of their work! Quickly change the numbered power settings and see the change in range. Marble Launcher works with any photogate. Learn more about the Timer and Photogates on page 23. Mounting plate has a convenient access hole for photogate lens. Marble Projectile Ramp Students of any age quickly adjust launch speed and angle, and quickly see results! 13 Preset launch angles from 30° to 90°. Achieve consistent, predictable results with this marble ramp. We have placed a convenient opening at the end of the ramp with a metal plate for attachment. You can attach any photogate to the end and measure the marble’s initial velocity. Then predict its final position. You’ll be amazed at the accuracy of the results! Students can also try to predict the motion using conservation of energy. Constructed of aluminum, the ramp is 6" high and 13" long and comes with one steel marble. You’ll need a clamp to hold it to the table. Complete instructions and experiments included. P2-8490 Marble Projectile Ramp $14 6 or more $13 14 1-800-367-6695