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A horizontal rod of length 511 cm is held aloft by friction against a brick wall...

A horizontal rod of length 511 cm is held aloft by friction against a brick wall on one end and on the other end by a rope of length 628 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 0.524. A ball of the same weight as the rod hangs from the rod.

a) What is the minimum distance ball must hang from the wall in order to the rod to stay stable?


(b) What is the tension in the cord if the rod weighs 8 kg?


(c) What is the reaction force where the rod touches the wall?

I know how to work out C just need a and b

Science   Advanced-Physics   
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