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Question 1 Choose the appropriate answer: 1- When a particle is in equilibrium, the sum of forces acting on it equals . A) A constant B) A positive number C) Zero D) A negative number E) An integer 2- For the link below, the sum of forces in the x-direction ( FX) is ___ . Use a sign convention of +  A) 600 cos 30o – 400 sin 45o B) 600 cos 30o – 400 cos 45o C) 600 sin 30o – 400 cos 45o D) 600 sin 30o – 400 cos 45o

3- Using the CCW direction as positive, the net moment of the two forces about point P is A) 10 N ·m B) 20 N ·m C) - 20 N ·m D) 40 N ·m E) - 40 N ·m

4- . Which equation of equilibrium allows you to determine FB right away? A) FX = 0 B) FY = 0 C) MA = 0 D) Any one of the above.  

5- Using this FBD, you find that FBC = – 500 N. Member BC must be in A) Tension B) Compression C) Cannot be determined

Question 2 Determine the magnitude and orientation, measured counterclockwise from the positive y axis, of the resultant force acting on the bracket.

Question 3 Determine the support reaction forces for the frame in Figure Q3

Question 4 For the truss shown in Fig. Q4, determine the force in each member of the truss using joint method of analysis. Indicate whether the members are in tension or in compression. 1 m

Question 5 The force F acts on the end of the pipe at B. Determine a) the moment of this force about point A. F= 70N a= 0.9 m b= 0.3 m c= 0.7 m Θ= 60 deg.

Question 6 Determine the force in members BE, EF, and CB, and state if the members are in tension or compression

Question 7 Replace the loading system acting on the beam by an equivalent resultant force and couple moment at point O.