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Physics

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    $\begingroup$ Yes Sir.. Accelration is change in velocity (magnitude or direction)! $\endgroup$
    – mcodesmart
    Commented Mar 7, 2014 at 6:15
  • $\begingroup$ @aksakai I get that you are assuming that the obvious is in deed obvious. I know that the centrifugal 'force' pulling the rope taut is manifested because its getting a constant course correction from the curve of the orbit. The tangent line is the closest extrapolation of a straight line from the curve so thats where you'd expect the inertia to propagate? Why is it then 90 degrees? Why does there seem to be zero inertia along the tangent line when that is the direction it is moving at any moment? $\endgroup$
    – Mike S
    Commented Mar 7, 2014 at 7:14
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    $\begingroup$ 90 degrees thing can't be explained in words, really. you have draw, consider infinitesimal changes etc. the only blah-blah argument to be done is that the rope is really the only thing that pulls the body, it's pulling to the center. it can't pull forward or sideways. $\endgroup$
    – Aksakal almost surely binary
    Commented Mar 7, 2014 at 14:03
  • $\begingroup$ @MikeS " I know that the centrifugal 'force' pulling the rope taut is manifested because "- Do you mean centripetal force? The centrifugal force is not manifested because of this reason. $\endgroup$
    – user31782
    Commented Mar 27, 2014 at 5:13
  • $\begingroup$ At any given time a body is moving along the tangent, where the inertia is heading too, but the force is towards the center $\endgroup$
    – Aksakal almost surely binary
    Commented Mar 27, 2014 at 11:16