terryking228:
I helped a kid do a similar but different falling-object project: (Early, with a IBM PC, Parallel Port driving IR LED and IR Phototransistor)
...
Doubt I could resurrect the Turbo Pascal code after 20+ years...
Thanks for trying to get this thread back on track, Terry, so that the kid can prove Isaac Newton right or wrong. 
What I think he needs is a bit of code to measure the time, in milliseconds, between two events, however he detects them.