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F04_exam2

# F04_exam2 - equilibrium Find You are asked to determine the...

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ME 270 - Fall 2004 SOLUTION Examination No. 2 PROBLEM NO. 1 Given : A structure is made up of links AGB and CBD. Block E, having a mass of 120 kg, hangs from a cable that is attached to point G on link AGB and is hung over a pulley attached to pin D. Consider the weight of the links to be negligible, and the pulley at D to be frictionless. Find : For this problem: a) complete the three free body diagrams given below. b) determine the reactions acting on link CBD at pin C . Write your answer as a vector . 2m 2m 3m 2m 0.5m A B C D E G

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ME 270 - Fall 2004 SOLUTION Examination No. 2 PROBLEM NO. 2 Given: A crate weighing 1500 lbs is supported by small feet on a rough, horizontal surface ( μ S = 0.8 ). The crate supports block A (weighing 2500 lbs) with a cable that is pulled over a fixed, rough circular drum. The static coefficient of friction between the cable and drum is S = 0.4 . Block A rests on a smooth inclined surface, as shown in figure below. A force F is needed to act to the left on the crate to hold the system of the crate and block in
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Unformatted text preview: equilibrium. Find : You are asked to determine the smallest value of F needed to maintain equilibrium . In your solution: a) Complete the free body diagrams for the crate and block A below. b) Clearly state all assumptions that you make and show any checks that you make on your assumptions. c) In your final answer, state whether the crate is in a state of impending tipping or slipping . S = 0.8 G B D A 2 ft 3 ft 5 ft S = 0.4 smooth F 3 ft 60° horizontal parallel to inclined surface 2 ft ME 270 - Fall 2004 SOLUTION Examination No. 2 PROBLEM NO. 3 Given: Beam AB is built into a fixed wall at end A. A distributed line load acts on the beam as shown below. A 2000 lb force also acts at end B. Find : Determine the reactions at end A due to this loading. Write your answers as vectors . 300 lb/ft 600 lb/ft 3 ft 3 ft A B 2000 lb 36.87°...
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F04_exam2 - equilibrium Find You are asked to determine the...

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