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Problem 7.9

7.9.

First off, we are trying to find the speed at the point A. From the conservation of energy,

tex2html_wrap_inline296

tex2html_wrap_inline298

tex2html_wrap_inline300

or tex2html_wrap_inline302

Now, we are trying to find the normal force acting on the bead at A. To do this, let's sum the forces. We know that the acceleration that the bead feels is tex2html_wrap_inline304 , so that gives us

tex2html_wrap_inline306

or tex2html_wrap_inline308

So, we find that N = .0980 N in a downward direction.


Jason George Zeibel
Thu Oct 30 00:58:31 EST 1997