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statics testfall2009 - TEST#1 STATICS NAM E 1 A rectangular...

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Unformatted text preview: TEST#1 STATICS NAM E: 1) A rectangular plate is suspended from three cables as shown. The force in cables AB, AC, and AD are 721lb, 825lb, and 447Ib, respectively. The length of AC is 8.25 feet. Point D is halfway along the edge. Find: a) dimensions of the plate, b) express all forces in Cartesian vector form, c) resultant of the three forces, d) angle between AB and AC, e) component of the force AD along AC. BOX IN ANSWERS SCORE 1) 2) 2)For the Equilibrium system shown, it is known that the forces in springs 1,2, and 3 are 100lb, 200lb, and 50lb, respectively. It is also known that spring four is stretched 0.167ft. Find: a) equivalent spring constant for springs 1, 2, and 3, b) ~ force from the combination of springs going into the pulley system, c) weight of block E (WE), d) weight of block D(WD), e) tension in the cable that is at 20°, f) moment generated at A. K1 = 400lb/ft, K2 = SOOlb/fi, K3 =600lb/ft, K4 = 15OOIb/ft BOX IN ANSWERS 3) For the system of forces and moments shown, find: a) Forces and moments in Cartesian vector form, b) moments of the 400lb force about the coordinate axes, c) moment of the 500lb force about dashed line 0C, 0!) replace the force system by an equivalent force/ moment at A, e) can the system be reduced to a single force? BOX IN ANSWERS ...
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