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14. The (vertical) forces at points A, B and P are FA , FB and FP , respectively. We note that FP = W and
    is upward. Equilibrium of forces and torques (about point B) lead to

                                           FA + FB + W     =   0
                                               bW − aFA    =   0

    (a) From the second equation, we find FA = bW/a = (15/5)W = 3W .
    (b) Using this result in the first equation above, we obtain FB = W − FA = −4W , pointing downward
        (as indicated by the minus sign).

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  • 1. 14. The (vertical) forces at points A, B and P are FA , FB and FP , respectively. We note that FP = W and is upward. Equilibrium of forces and torques (about point B) lead to FA + FB + W = 0 bW − aFA = 0 (a) From the second equation, we find FA = bW/a = (15/5)W = 3W . (b) Using this result in the first equation above, we obtain FB = W − FA = −4W , pointing downward (as indicated by the minus sign).