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Re: Newton's 3rd law? was Re: inertial forces (definition)

Leigh Palmer wrote:

I dislike the term "centripetal" and I would never allow its use
for anything but uniform circular motion. I have never used what
should be the standard terms for curvilinear motion: tangential.
normal and binormal components of acceleration and force. I note
that the binormal components of these quantities are always zero.

Leigh

I had to look up binormal in my Funk & Wagnalls. The definition sounds
like that for normal. What's the difference?

poj

P.S. You get another attaboy for your stand on centripetal. Terrible
word.