PCE219_Exam 1_2007

PCE219_Exam 1_2007 - PCE 219 Exam 1 September 27, 2007...

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PCE 219 Exam 1 September 27, 2007 Name:_____________________________ Read problems carefully and show all work. 1. (25 points) In the structure shown below, a string is attached to two pulleys at points A and B and then the ceiling directly above point A. The string is holding a weight of 100N. The pulleys are frictionless and the system is at rest. a. Draw a free body diagram of the entire wire and pulley wheels , introducing and showing appropriate forces acting on the free body diagram. b. Draw a free body diagram of just the pulley wheel A. c. Write the appropriate equations and determine the reaction forces that the support at A must impart to the wheel. A B 100 N π /4 C
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2. (25 points) The linkage shown below hangs from a ceiling and supports 2 weights. As shown in the figures, there is an applied external load of 1000 lb on the lower rod with a diameter of 1”, and an additional load of 2000 lb applied at the interface of the two rods. The upper bar has a diameter of 2”. The upper rod
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PCE219_Exam 1_2007 - PCE 219 Exam 1 September 27, 2007...

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