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Hello again,
Bernard noted (thanks for the correction!):
"Wait a min -- I thought centripetal force was the
"real" force (wha=
t
keeps the bob from observing the 1st law, and
c-fugal was the frame f=
orce
(pseudo or unreal force)."
Yes, of course I should have stated that
"centrifugal" force arises i=
n a
non-inertial reference frame!
Still I would claim that there is no centripetal
force as such; it is=
just a
nickname for a sum of real forces acting in the
normal direction.
Who could explain what is the rationale behind the
TPT derivation whi=
ch talks
about centripetal force as an extra real force in
addition to tension=
and
weight?
Regards,
Antti