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August 22, 2014

Homework Help: Physics

Posted by jhay on Friday, July 8, 2011 at 2:45am.

A ball (mass m = 250 g) on the end of an ideal string is moving
in circular motion as a conical pendulum as in the gure. The
length L of the string is 1.67 m and the angle with
the vertical is 37 degrees

A) What is the magnitude of the angular momentum (kg m2/s) of the ball about the
support point?


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What I have so far.

L = r X P

P = m * v

V = (r*g*tan)^.5

What I am having problems on is finding r, since its at the support point, it will not be the radius of the circle.




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