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At 6:40 PM -0400 10/23/99, Bob Sciamanda wrote:velocity,
One can always resolve these vectors in two perpendicular directions,
chosen parallel and perpendicular to the present velocity vector:
F_t = m dv/dt , and
F_c = mv^2/r . , where
F_t is the component of the net force tangential to the present
thisand
F_c is the component of the net force perpendicular to the velocity and
directed toward the center of curvature (r); v is the instantaneous
speed.
This can always be done and is very useful. There is no exception to
.-method of decomposition of F=mA.
Bob
I *THINK* that the pedagogical point that some are trying to make
(and which I agree with) is that it is better to refer to v^2/r as
the centripetal acceleration that goes on the RHS of N2 rather than
as a force component that does on the LHS thereof.
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