DOL V 12 A light elastic cord of length lo = 5.0 m and stiflness k= 50 N/m is inside o fixed box with a small portion of length xo 20 cm left out of a hole on 1 wall of the box as shown in the figure. If the cord is pulled out of the box, a frictional force F= 25 N acts on the cord. How much work has to be done in slowly pulling out the entire length of the cord? Ans Flo-Ko) + E(1- 16) =132.25 I elination 0 with the

DOL V 12 A light elastic cord of length lo = 5.0 m and stiflness k= 50 N/m is inside o fixed box with a small portion of length xo 20 cm left out of a hole on 1 wall of the box as shown in the figure. If the cord is pulled out of the box, a frictional force F= 25 N acts on the cord. How much work has to be done in slowly pulling out the entire length of the cord? Ans Flo-Ko) + E(1- 16) =132.25 I elination 0 with the

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter1: Tension, Compression, And Shear

Section: Chapter Questions

Problem 1.3.26P: A plane frame with a pin support at A and roller supports at C and £ has a cable attached at E....

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A safety valve on the top of a tank containing steam under pressure p has a discharge hole of diameter d(see figure). The valve is designed to release the steam when the pressure reaches the value Pmax If the natural length of the spring, is L and its stiffness is k, what should be the dimension ft of the valve? (Express your result as a formula for h.)
A bungee jumper having a mass of 55 kg leaps from a bridge, braking her fall with a long elastic shock cord having axial rigidity EA = 2.3 kN (see figure). If the jumpoff point is 60 m above the water, and if it is desired to maintain a clearance of 10 m between the jumper and the water, what length L of cord should be used?
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A large precast concrete panel for a warehouse is raised using two sets of cables at two lift lines, as shown in the figure part a. Cable 1 has a length L1 = 22 Ft, cable 2 has a length L2= 10 ft, and the distance along the panel between lift points Band D is d = 14 ft (see figure part b). The total weight of the panel is W = 85 kips. Assuming the cable lift Forces F at each lift line are about equal, use the simplified model of one half of the panel in figure part b to perform your analysis for the lift position shown. Find the required cross-sectional area AC of the cable if its breaking stress is 91 ksi and a factor of safety of 4 with respect to failure is desired.
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