A rectangular piece of wood, 50 mm x 100 mm in cross-section is used as a compression block as shown in the figure. Determine the maximum axial load P which can be safely applied to the block if the compressive stress in the wood is limited to 20 MPa.

A rectangular piece of wood, 50 mm x 100 mm in cross-section is used as a compression block as shown in the figure. Determine the maximum axial load P which can be safely applied to the block if the compressive stress in the wood is limited to 20 MPa.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter14: Static Equilibrium, Elasticity, And Fracture

Section: Chapter Questions

Problem 49PQ

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Concept explainers

Mechanical Properties of Solids

There are three types of matter- solid, liquid and gas. Out of them, solids have a rigid shaped and size. The intermolecular forces of attractions in solids are greatest. Mechanical properties are the physical properties of a material which it shows, when it is provided with certain amount of force or load. These properties are to be kept in mind for various purposes. When a force is applied to an object, the object may or may not get deformed depending upon its elastic property. But every time the object develops a restoring force against the force applied. This is commonly known as stress. If the object changes its dimensions due to the force applied it develops strain ( which is the ratio of change in dimension to the original dimension).

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A rectangular piece of wood, 50 mm x 100 mm in cross-section is
used as a compression block as shown in the figure. Determine the maximum
axial load P which can be safely applied to the block if the compressive stress in
the wood is limited to 20 MPa.

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