Step 1
Cut 4 pieces of wood as shown above.
Step 2
Drill 3/16" holes as shown.
Step 3
Assemble as shown.
Use a wing nut to attach the Pendulum Arm.
Step 4
Draw a line across the Scale Arm along the edge of the Pendulum Arm
Step 5
Remove the scale arm then carefully measure and draw a line along its
center.
With a ruler make marks at the following intervals starting from the
pendulum line:
5 cm, 8.5 cm, 11.3 cm, 13.4 cm, 15.1 cm, 16.4 cm, 17.7 cm, 19.6
cm, 23.4 cm
Step 6
Mark the scale:
0, 5, 10, 15, 20, 25, 30, 35, 50, 100
The units are meters.
Note the scale is irregular. This is to allow for the crowding (numbers
get tight together)
that occurs at the upper end of the scale.