133. (a) Sample Problem 8-3 illustrates simple energy conservation in a similar situation, and derives the frequently encountered relationship: v = 2gh. In our present problem, the height change is equal to the rod length L. Thus, using the suggested notation for the speed, we have vo= 2gL. (b) At Bthe speed is (from Eq. 8-17) 2024vvgLgL=+=.The direction of the centripetal acceleration (v2/r= 4gL/L= 4g) is upward (at that
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