Asked by jhay

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.



Answered by bobpursley
r=1.67*sin37
Answered by jhay
r would equal that if we were looking at the momentum of the ball about the circle and not at the support point
Answered by bill
Use the length of the string for "r".
Answered by bill
except for in your equation for the velocity; use the radius of the circle there
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