Problem no. 2. A wheel of carries a load of 1000kg, as shown in figure. a. Determine the horizontal force P applied at the center which is necessary to start the wheel over a 5m. block. Also find the reaction at the block. b. If the force P may be inclined at any angle with the horizontal, determine the minimum value of P to start the wheel over the block; the angle P makes with the horizontal; and the reaction at the block. 7m 5m P 10m

The 80-lb boy stands on the beam and pulls on the cord with a force large enough to just cause him to slip. If the coefficient of static friction between his shoes and the beam is (u)p = 0.4, which of the following the %3D D reactions at A and B. The beam is uniform and has a weight of 100 lb. Neglect the size of the pulleys and the thickness of the beam. a) Ay = 467.1 lb,B, = = 467.1 lb, Bx = 370 lb, B, = 221.5 lb %3D b) Ay = 479.3 lb, Bx = 381 lb, B, = 251.2 lb c) Ay = 4347 lb, B = 354 lb, B, = 237.8 lb 5 f - -3 ft- -4 ft- %3D %3D d) A, = 451.1 lb, B, = 372 lb, B, = 281.7 lb %3D e) Ay = 473.1 lb, Bx = 358 lb, By = 271.6 lb

Problem 1: As an airplane's brakes are applied, the nose wheel exerts two forces on the end of the landing gear as shown. a. Determine the horizontal and vertical components of reaction at the pin C, (Cx and Су). b. Determine the force in strut AB. 30 400 mm - 20° 600 mm 2 kN 6 kN

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For a = 1.5m, determine the reactions at pin A and roller B. 1800 N/m A 4 m Solution: • There are two distributed loads acting on the beam, left and right. Replace them with equivalent concentrated loads respectively: 1. The distributed load on the left part of the beam is equivalent to F₁: o Magnitude of it: F₁ = N; o Location of it: x₁ = m to the right of A; 2. The distributed load on the right part of the beam is equivalent to F2: o Magnitude of it: F2 = N; o Location of it: X₂ = 600 N/m B 1. Reactions on A: 2 Reactions on R • The two supports are replaced by corresponding reactions: → m to the right of A;

The 800-lb cylinder is supported by three chains as shown. Determine the force in each chain for equilibrium. Take d = 1 ft.

Determine the force and moment reactions at the support A of the cantilever beam subjected to the load distribution shown. The reaction force R, is positive if up, negative if down. The reaction moment M, is positive if counterclockwise, negative if clockwise. - w = kVT wo E 1.6 b 1.2 b Answers: RA |1.07 bwo MA b?wo

4. Determine the horizontal and vertical components of reaction at the pin A and smooth support at B. В A 30 0.75 m 90 N· m 1 m 0.5 m 60 N

2. Show complete solution.

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