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LEBANESE INTERNATIONAL UNIVERSITY

MENG250 - Statics:

Assignment#2

Summer 2013-2014 semester

NAME:

ID:

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Problem 35. The members of a truss are connected to the gusset

plate. If the forces are concurrent at point O, determine the magnitudes

of F and T for equilibrium. Take = 30o.

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Problem 3-21.Each cord can sustain a maximum tension of 200 lb.

Determine the largest weight of the sack that can be supported. Also,

determine the angle of cord DC for equilibrium.

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Problem 330. The springs on the rope assembly are originally

stretched 1 ft when =0o. Determine the vertical force F that must be

applied so that =30o.

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Problem 341. A continuous cable of total length 4 m is wrapped

around the small pulleys at A, B, C, and D. If each spring is stretched

300 mm, determine the mass m of each block. Neglect the weight of

the pulleys and cords. The springs are unstretched when d = 2 m.

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Problem 359. If each cable can withstand a maximum tension of

1000 N, determine the largest mass of the cylinder for equilibrium.

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Problem 362. A small peg P rests on a spring that is contained inside

the smooth pipe. When the spring is compressed so that s = 0.15 m,

the spring exerts an upward force of 60 N on the peg. Determine the

point of attachment A(x, y, 0) of cord PA so that the tension in cords

PB and PC equals 30 N and 50 N, respectively.

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Problem 374. The lamp has a mass of 15 kg and is supported by a

pole AO and cables AB and AC. If the force in the pole acts along its

axis, determine the forces in AO, AB, and AC for equilibrium.

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