Anemometer, measure wind speed in a variety of experiments. Hold the sensor in your hand to measure wind speed in dynamic environments or use the accessory rod to position it in front of wind tunnels or fans, standard camera mount on the back.
Free Fall Apparatus Economy, for determination of the gravitational constant ft gft, This kit has a wooden base, 1.1m rod and a movable electro magnet, can be moved anywhere on the rod, when the ball is released the timer is triggered and stopped one the ball his landed on the base