Problem 251 A vertical force P at A and another vertical force F at B in Fig. P-251 produce a resultant of 100 lb down at D and a counterclockwise couple C of 200 lb·ft. Find the magnitude and direction of forces P and F.
Solution 251
$3P = 7(100) + 200$
$P = 300 \, \text{ lb downward}$ answer
$\Sigma F_V = R$
$P - F = 100$
$300 - F = 100$
$F = 200 \, \text{ lb upward}$ answer
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