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**how do i do this????!**

I'm having trouble with two of my Physics Problems. It goes a little something like this:

A bowling ball weighing

*w*is attached to the ceiling by a rope of length L. The ball is pulled to one side and released; it then swings back and forth as a pendulum. As the rope swings through the vertical, the speed of the bowling ball is

*v*.

What is the acceleration of the bowling ball, in magnitude and direction, at this instant? Take the free fall acceleration to be g.

And then the last:

A bob of mass

*m*is suspended from a fixed point with a massless string of length L (i.e., it is a pendulum). You are to investigate the motion in which the string moves in a cone with half-angle theta.

What tangential speed,

*v*, must the bob have so that it moves in a horizontal circle with the string always making an angle theta from the vertical? Express the speed in terms of m, g, L, and/or theta.

I'm having a particularly hard time with the first one. THanks if you decide to help a brother out!!!

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