PIRA 1C30.10 Measuring g: Freefall Timer
Photo shows the demonstration used at the University of Texas at Austin.
Instructions / Notes:
- The distance between the electromagnet at the top of a ring stand and the interruptor switch is one meter.
- Do not attempt to adjust the distance between the electromagnet and the interruptor switch.
- The black "Start/Stop" button on the left releases the ball from the electromagnet at the top of the ring stand.
- To reset: push the reset button on the front panel of the timer, then push down in the inner most end on the interrupter switch (labeled #2) in the catch basket. This must be done between runs for the demonstration to function properly.
Demo Staff:
- The interruptor switch - (which acts as the timer's remote cut-off switch) - is located at the bottom of the ring stand.
- The mechanical switch can get sticky after several uses, at which point the clock will run continuously after the ball drops.
Last Updated 7/24 - University of Texas at Austin - All Rights Reserved
