247_Dynamics 11ed Manual

247_Dynamics 11ed Manual - 0.933 m = Problem 14-7 Design...

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Engineering Mechanics - Dynamics Chapter 14 The deformation is T 1 U 12 + T 2 = 1 2 Mv 2 F avg x 0 = x 1 2 M v 2 F avg = x 38.2 mm = Problem 14-6 The crate of mass M is subjected to forces F 1 and F 2 , as shown. If it is originally at rest, determine the distance it slides in order to attain a speed v . The coefficient of kinetic friction between the crate and the surface is μ k . Units Used: kN 10 3 N = Given: M 100 kg = v 6 m s = F 1 800 N = k 0.2 = F 2 1.5 kN = g 9.81 m s 2 = θ 1 30 deg = 2 20 deg = Solution: N C F 1 sin 1 () Mg F 2 sin 2 () + 0 = N C F 1 sin 1 () Mg F 2 sin 2 () + = N C 867.97 N = T 1 U 12 + T 2 = F 1 cos 1 () s k N c s F 2 cos 2 () s + 1 2 Mv 2 = s Mv 2 2 F 1 cos 1 () k N C F 2 cos 2 () + () = s
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Unformatted text preview: 0.933 m = Problem 14-7 Design considerations for the bumper B on the train car of mass M require use of a nonlinear spring having the load-deflection characteristics shown in the graph. Select the proper value of k so that the maximum deflection of the spring is limited to a distance d when the car, traveling at speed v , strikes the rigid stop. Neglect the mass of the car wheels. 245...
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.

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