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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.

Problem 1: (25 points) This problem consists of two parts and is worth 25 points.  In the figure below, assume F1 = 3000 lb, F2 = 4500 lb, a = 4 ft, b = 6 ft, c = 2.5 ft, and d = 3.5 ft.

(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. 

Ben has several exams coming in a week. He is under a lot of stress. Which hormone is likely to increase?

(4d) Determine the magnitude of the resultant moment at O. Enter the value in the box below. 

(1b) Determine the forces in members BC, BD, and ED using the method of sections. Clearly indicate whether each member is in tension or in compression in your supporting calculations. Enter the force in member BC in the box below. 

(4a) Express the tension in the cable BC as a vector. Enter the x component in the box below. 

Luke is having trouble hearing high-pitched tones but can still hear low-pitched tones. This is best explained by _______________.

Alberto wants to try some new foods. His friend Maya is taking Psych 101 and gives him some suggestions about gustatory perception. Which of the following suggestions are not true? 

Linda began to drink a kind of herbal tea every day to lose weight. She trusted the tea that the tea would work because her friends told her the tea made them lose weight in just two weeks. Why might Linda’s choice of tea be problematic?