Thinking Like an Engineer: An Active Learning Approach (4th Edition)
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
4th Edition
ISBN: 9780134639673
Author: Elizabeth A. Stephan, David R. Bowman, William J. Park, Benjamin L. Sill, Matthew W. Ohland
Publisher: PEARSON
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Chapter 13.5, Problem 3CC
To determine

Find an appropriate model for the given data set.

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6/86 The connecting rod AB of a certain internal-combustion engine weighs 1.2 lb with mass center at G and has a radius of gyration about G of 1.12 in. The piston and piston pin A together weigh 1.80 lb. The engine is running at a constant speed of 3000 rev/min, so that the angular velocity of the crank is 3000(2)/60 = 100л rad/sec. Neglect the weights of the components and the force exerted by the gas in the cylinder compared with the dynamic forces generated and calculate the magnitude of the force on the piston pin A for the crank angle 0 = 90°. (Suggestion: Use the alternative moment relation, Eq. 6/3, with B as the moment center.) Answer A = 347 lb 3" 1.3" B 1.7" PROBLEM 6/86
6/85 In a study of head injury against the instrument panel of a car during sudden or crash stops where lap belts without shoulder straps or airbags are used, the segmented human model shown in the figure is analyzed. The hip joint O is assumed to remain fixed relative to the car, and the torso above the hip is treated as a rigid body of mass m freely pivoted at O. The center of mass of the torso is at G with the initial position of OG taken as vertical. The radius of gyration of the torso about O is ko. If the car is brought to a sudden stop with a constant deceleration a, determine the speed v relative to the car with which the model's head strikes the instrument panel. Substitute the values m = 50 kg, 7 = 450 mm, r = 800 mm, ko = 550 mm, 0 = 45°, and a = 10g and compute v. Answer v = 11.73 m/s PROBLEM 6/85

Chapter 13 Solutions

Thinking Like an Engineer: An Active Learning Approach (4th Edition)

Ch. 13 - Prob. 7ICACh. 13 - The following instructions apply to ICA 13-7 to...Ch. 13 - The following instructions apply to ICA 13-7 to...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - The following instructions will apply to ICA 13-10...Ch. 13 - Prob. 21ICACh. 13 - As a reminder, the Reynolds number is discussed in...Ch. 13 - As a reminder, the Reynolds number is discussed in...Ch. 13 - An environmental engineer has obtained a bacteria...Ch. 13 - An environmental engineer has obtained a bacteria...Ch. 13 - An environmental engineer has obtained a bacteria...Ch. 13 - A growing field of inquiry that poses both great...Ch. 13 - If an object is heated, the temperature of the...Ch. 13 - The Volcanic Explosivity Index (VEI) is based...Ch. 13 - You are an engineer for a plastics manufacturing...Ch. 13 - A Pitot tube is a device used to measure the...Ch. 13 - As part of an electronic music synthesizer you...Ch. 13 - The following data were collected during testing...Ch. 13 - The relationship of the power required by a...Ch. 13 - When a fluid flows around an object, it creates a...
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