20-Piece Complete Photogate System Kit

This 20-piece photogate system provides accurate timing for a range of physics experiments, including freefall, air track collisions, rolling-object speed, and pendulum periods. An infrared light beam allows the system to calculate oscillatory periods, count blocking events, and measure the time an object takes to pass through one or both photogates. From those measurements, velocities and accelerations can be derived. The kit includes two photogates, a digital photogate timer, threaded and unthreaded support rods, thumb screws, a battery, sliding supports, large and small interruption screens, supports, photogate cables, and an activity guide. Everything ships in a deep Gratnell tray. The support pole position is adjustable, so the photogates can record data at a variety of heights and angles.