A steel ball is clamped into a spring-loaded release mechanism. At the instant the ball is released, the electronic timer automatically starts. The timer stops when the ball hits the receptor pad. With the accurate, high resolution timing and automatic start and stop, measurements of “g” are accurate, precise and repeatable. For best results, the drop height (h) should be the full two meters allowed by the cable. Shorter heights will work fine, but accuracy is slightly reduced.

The equation h = (1/2) gt^2 gives the time of flight, therefore g = 2h/(t^2) gives the measurable value of g.

Pasco software setup:

1. Set up the Free Fall Adapter in the data collection software.

2. Open a display such as a Digits display to show the time of fall for the ball.

3. Start recording data.

4. Loosen the thumbscrew on the Free Fall Adapter to release the ball.

5. Stop recording data after the ball hits the receptor pad. Read the time on the Digits display.