MULTISTEP Astraight rod of negligible mass is mounted on a
Chapter , Problem 33(choose chapter or problem)
MULTISTEP Astraight rod of negligible mass is mounted on a frictionless pivot, as shown in Figure 7-38. Blocks having masses and are attached to the rod at distances and (a) Write an expression for the gravitational potential energy of the blocks Earth system as a function of the angle made by the rod and the horizontal. (b) For what angle is this potential energy a minimum? Is the statement systems tend to move toward a configuration of minimum potential energy consistent with your result? (c) Show that if the potential energy is the same for all values of (When this holds, the system will balance at any angle u. This result is known as Archimedes law of the lever.)
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