We were always taught it was centripetal acceleration acting on a mass, and the reaction in the string gives an apparent force.
Probably why he kept referring to it as 'so-called' centrifugal force.
(, Fri 13 Nov 2020, 7:28, Reply)
when you use a rotating frame of reference.
Which is a (possibly) clever thing to say that I don't really understand, but stole from XKCD...
xkcd.com/123/
(, Fri 13 Nov 2020, 12:42, Reply)
(, Fri 13 Nov 2020, 18:01, Reply)
It depends on your frame of reference I believe. If the FoR is rotating with the system, then the force is centrifugal. If the FoR is an inertial one, it's centripetal.
Edit: Yeah, essentially what FB's xkcd link says. Should probably refresh before commenting next time.
(, Fri 13 Nov 2020, 13:08, Reply)