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7 cards from this deck
606060 N (horizontal equilibrium)
33.6433.6433.64 kg (using moments)
31.6231.6231.62 N
Sum of clockwise moments = sum of anticlockwise moments
Choose where unknown forces act (they produce no moment about that point)
sumFx=0sum F_x = 0sumFx=0
sumFy=0sum F_y = 0sumFy=0
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