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Re: Free-body diagram Correction




Jerome Epstein wrote


If the cone is moving (and is
frictionless) the stone will accelerate straight down to the cone apex,
there being nothing that can provide a tangential acceleration.

But the problem maintains that it is the cone that is moving and still the
stone can maintain it's position.

Sciamanda wrote:
It matters not whether the cone is rotating;
the object, however needs a specific velocity (equivalently,
rotational speed).

I tend to agree with him. The normal force will be the same in both
cases...but the students really have a hard time with this one. Please
enlighten!