Design requirement for the given condition of hook should be determined. Concept introduction: Stress is defined as the ratio of load per unit area. It is denoted by σ . σ = P A Where, P is the load in pound. A is area in square inch. Factor of Safety is defined as the ratio of yield stress to working stress. It is defined as, Factor of Safety = Yield Stress Working Stress Yield stress is the maximum stress that a material can withstand. Working Stress is the required value of stress of material be able to withstand.

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Chapter 7, Problem 7.64DP

Interpretation Introduction

Interpretation:

Design requirement for the given condition of hook should be determined.

Concept introduction:

Stress is defined as the ratio of load per unit area. It is denoted by σ.

σ = PA

Where,

P is the load in pound.

A is area in square inch.

Factor of Safety is defined as the ratio of yield stress to working stress. It is defined as,

Factor of Safety = Yield StressWorking Stress

Yield stress is the maximum stress that a material can withstand.

Working Stress is the required value of stress of material be able to withstand.

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