1. Adjust the height of the upper The Free Fall Adapter on the stand such that the two The Free Fall Adapter are 50 cm apart. Keep the lower The Free Fall Adapter in its place. Connect The Free Fall Adapter to the time of flight accessory and  Smart Timer and turn it on.
Take a ball and release it just from above the upper The Free Fall Adapter, such that it passes through the The Free Fall Adapter from its front. The timer will automatically measure the time it takes the ball to travel between the The Free Fall Adapter and time of flight accessory.  Record the falling distance and the corresponding time in the table.
2. Using the red "Select Measurement" button, choose the "Time Measurement." Using the blue "Select Mode" button, choose the "Two Gates Mode."
3. Press Start
5. By adjusting the height of The Free Fall Adapter, increase the distance/separation between the The Free Fall Adapter by 15 cm and repeat the last two steps. Repeat this for 5 separations in total (each time increase the separation by 15 cm). Record your values in the table
