problem11_56

# University Physics with Modern Physics with Mastering Physics (11th Edition)

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11.56: (a) and (b) Lower rod: ) cm 0 . 8 ( ) cm 0 . 4 )( N 0 . 6 ( : 0 p A = = Σ τ N 0 . 3 = A N 9.0 N 3.0 N 0 . 6 N 0 . 6 : 0 3 = + = + = = Σ A T F Middle rod : ) cm 0 . 5 )( N 0 . 9 ( ) cm 0 . 3 ( : 0 p = = Σ B τ N 15 = B N 24 N 9.0 N 15 : 0 3 2 = + = + = = Σ T B T F Upper rod : ) cm 0 . 6 ( ) cm 0 . 2 )( N 24 ( : 0 p C = = τ Σ N 0 . 8 = C N 32 N 8.0 N 24 : 0 2 1 = + = + = = Σ C T T F

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(c) The center of gravity must lie somewhere directly below
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