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A horizontal rod of length 550 cm is held aloft by friction against a brick wall...

A horizontal rod of length 550 cm is held aloft by friction against a brick wall on one end and on the other end by a rope of length 739 cm, which itself is attached to the brick wall directly above where the rod touches the wall. The coefficient of static friction between the wall and the rod is 0.549. A ball of the same weight as the rod hangs from the rod.
What is the minimum distance ball must hang from the wall in order to the rod to stay stable?

Science   Advanced-Physics   
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