Answers: FA= FB = i i kN kN

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Find the internal force systems acting on sections 1 and 2.

Find the forces in the three cable segments and the angles 1,2, and 3.

The garden shears shown consist of two blades and two handles. The two handles are connected by pin C and the two blades are connected by pin D. The left blade and the right handle are connected by pin A; the right blade and the left handle are connected by pin B. Determine the magnitude of the forces exerted on the small branch at E when two 80-N forces are applied to the handles as shown.

2. Find the forces acting at pins C and D of the given frame. loworod slowly onto 2.2 m -3 m 2m DI 3 m3 m- B 4 m 240 N

The right-angle pipe OAB is shown here is supported by cable CB. The cable CB exerts a 750 N tensile force on point B. Pipe AB is located 30 degree below the positive Z axis. Determine the X, Y and Z components of the 750 N tensile force Replace the 750 N force by a force-couple system at point O. C 0.7 m N 1.2 m- 1.6 m. 30° B 0.8 m

Q3) A lug wrench is used to tighten a square-head bolt. If 50-lb forces are applied to the wrench as shown, determine the magnitude F of the equal forces exerted on the four contact points on the 1-in. bolt head so that their external effect on the bolt is equivalent to that of the two 50-lb forces. Assume that the forces are perpendicular to the flats of the bolt head. 50 lb A View C Detail (clearances exaggerated) 14" 50 lb 14" B. Q4) A commercial airliner with four jet engines, each producing 90 kN of forward thrust, is in a steady, level cruise when engine number 3 suddenly fails. Determine and locate the resultant of the three remaining engine thrust vectors. Treat this as a two-dimensional problem. 4 90 kN 9 m 12 m 12 m 90 kN 9 m 90 kN 1 Good luck

Q3) A lug wrench is used to tighten a square-head bolt. If 50-lb forces are applied to the wrench as shown, determine the magnitude F of the equal forces exerted on the four contact points on the 1-in. bolt head so that their external effect on the bolt is equivalent to that of the two 50-lb forces. Assume that the forces are perpendicular to the flats of the bolt head. 1"- A 50 lb A C View C Detail (clearances exaggerated) 14" 50 lb 14"

A truss supports the loading shown. Determine the equivalent force acting on the truss and the point of intersection of its line of action with a line drawn through points A and G.