Wow-look at that marble roll! This fun, hands-on equipment allows students to perform experiments on a roller coaster without leaving the classroom. Students will gain a clear understanding of the conservation of energy, potential energy, kinetic energy, and gravitational force. As the steel marble rolls along the hilly track, it continuously exchanges potential and kinetic energy-clearly visible by the speed of the marble. With the Flinn PSworks Photogate Timer, students will quickly and accurately measure the time between photogates, and calculate the marble's speed and acceleration at different points along the track. The photogate timer simply clamps to the side of the track allowing quick and easy position changes for a variety of experiments. A Flinn PSworks Support Stand and Photogate Timer are required, but not included.