(3b) Calculate the tension in the wire and the reactions against the rollers at A and at B. Enter the reaction at B in the box below. 

Problem 4: (30 points) This problem consists of four parts and is worth 30 points.  In the figure below, the right-angle pipe OAB is shown. A 750-N tensile force is exerted by the cable on point B. 

(2c) In your supporting calculations, replace the given loading by an equivalent standalone force and specify where the resultant’s line of action intersects the column AB and boom BC (You can provide x and y coordinates for where the line of action intersects AB, and x and y coordinates for where the resultant intersects BC). Enter the magnitude of the force in the box below. 

(3a) Draw the free body diagram of the uniform bar in your supporting calculations. Enter the number of unknown forces in the box below. 

(3a) Draw the free body diagram of the uniform bar in your supporting calculations. Enter the number of unknown forces in the box below. 

Problem 2: (30 points) This problem consists of three parts and is worth 30 points.  The crane shown is subjected to three coplanar forces.

(2a) Calculate the magnitude of the resultant force and the angle it makes with the positive x-axis. Enter the angle in the box below. 

Problem 3: (15 points) This problem consists of two parts and is worth 15 points.  The given uniform bar with end rollers weighs 60 lb and is supported by the horizontal and vertical surfaces and by the wire AC.

(1a) Determine the force in members AE and AB using the method of joints. Clearly indicate whether each member is in tension or in compression in your supporting calculations. Enter the force in member AE in the box below. 

Problem 2: (30 points) This problem consists of three parts and is worth 30 points.  The crane shown is subjected to three coplanar forces.