MECH340 — Mechanical Behavior of Materials

Imperfections in Solids

This lesson walks imperfections in solids the way you should attack homework and exams: wording first, method second, substitution last.

5.1 · Exam method

You are about to treat exam method as a decision, not a pile of isolated equations. (F0001)

flowchart TD
  51A[Read the given wording] --> 51B[Match Exam method]
  51B --> 51C[Convert units]
  51C --> 51D[Substitute and check size]

1. Circle every given number and its unit.
2. Underline the unknown.
3. Match the wording to one rule in this section.
4. Convert units, substitute, then sanity-check the size.

Circle given values/units, underline what is asked, identify topic, choose formula from wording, convert units before substituting, then sanity-check sign, size, and physical meaning. (F0001)

On an exam you apply this by reading the given wording first, then matching the method, then substituting with consistent units. If the numerical size or sign looks impossible, restart from the wording rather than forcing algebra. (F0001)

Keep the idea attached to a physical picture: what is changing, what stays fixed, and which symbol is being asked for

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Imperfections in Solids — Exercises

Exercise 1

A student is given data that points at exam method. Identify the rule, convert units, and state what must be checked before substituting. (F0001)

Worked solution

1. Read the wording and name the quantity. (F0001)
2. Select the matching rule from this module. (F0001)
3. Convert units, substitute, and reject an impossible size. (F0001)

Exercise 2

A student is given data that points at exam method. Identify the rule, convert units, and state what must be checked before substituting. (F0002)

Worked solution

1. Read the wording and name the quantity. (F0002)
2. Select the matching rule from this module. (F0002)
3. Convert units, substitute, and reject an impossible size. (F0002)

Exercise 3

A student is given data that points at exam method

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