I apologize for taking long to answer; school's been keeping me busy.
I have to admit this is the first time I encounter Kepler's laws and centripetal acceleration, so this was a double-enlightenment moment for me.
Cleonis, your first reply addresses my uneasiness with the wooden ramp...
Why thank you, Tim, for a most informative reply. :approve: Cleared up everything :wink:
Now I know that after my death, I can rest in peace, after I try to replicate Galilio's experiments, of course.
Again, thanks. I owe you one, and I will forever :-p
Well, this is my first post here. :biggrin: Hoping for fun times.
So, straight to topic, my title describes what I want to know. I tried searching online, but I did not come upon anything that explains how Newton came to find the value 9.8m/s^2, or even whether he did.
Also, if you happen...