Posted by anon on Monday, June 6, 2011 at 8:09pm.
Find the velocity at the time of impact from KE. Then, you can use conservation of momentum to find the penduluem/bullet combo at impact. From that, you know the KE of the combo, and it rises in height to have an increase in PE equaling the iniitial KE. At the max height, use geometry to find the angle it goes upwards.
bob, how can he solve for h if we don't know the initial height of the pendulum? we can't assume that's at zero.
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