A weight of 160 lb falls from a height of 2.5 ft to the center of a horizontal platform mounted on four helical springs. At impact each spring deflects 3 inches. Calculate the wire diameter if the maximum design stress is 60,000 psi and spring index of 5

A weight of 160 lb falls from a height of 2.5 ft to the center of a horizontal platform mounted on four helical springs. At impact each spring deflects 3 inches. Calculate the wire diameter if the maximum design stress is 60,000 psi and spring index of 5

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter2: Axially Loaded Members

Section: Chapter Questions

Problem 2.8.11P: A bumper for a mine car is constructed with a spring of stiffness k = 1120 lb/in. (see figure). If a...

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Concept explainers

Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.

Question

A weight of 160 lb falls from a height of 2.5 ft to the center of a horizontal platform mounted on four helical
springs. At impact each spring deflects 3 inches. Calculate the wire diameter if the maximum design stress
is 60,000 psi and spring index of 5

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