PROB. 53 *54. A block B is pushed against three springs by a force P (see figure). The middle spring has stiffness k, and the outer springs each have stiffness k2. Initially, the springs are unstressed and the middle spring is longer than the outer springs (the difference in length is denoted s). (a) Draw a force-displacement diagram with the force P as ordinate and the displacement x of the block as abscissa. (b) From the diagram, determine the strain energy U, of the springs when x = 2s. (c) Explain why the strain energy U, is not equal to P&2, where 8 = 2s.

PROB. 53 *54. A block B is pushed against three springs by a force P (see figure). The middle spring has stiffness k, and the outer springs each have stiffness k2. Initially, the springs are unstressed and the middle spring is longer than the outer springs (the difference in length is denoted s). (a) Draw a force-displacement diagram with the force P as ordinate and the displacement x of the block as abscissa. (b) From the diagram, determine the strain energy U, of the springs when x = 2s. (c) Explain why the strain energy U, is not equal to P&2, where 8 = 2s.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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