3.4.2.2 The Young modulus

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Last updated 9:13 PM on 9/22/26
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9 Terms

1
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What is the definition of the young modulus? And what is the unit?

. The ratio of tensile stress to tensile strain.

. Unit: Pa or N/m²

2
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What is stress?

The pressure acted upon a solid

3
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Formula for stress?

Force/area (same as pressure)

4
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When calculating the young modulus, what is the range of values you should get?

10^8 to 10^10 Pa

5
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Formula for young modulus?

Stress/strain

6
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In a stress vs strain graph… what does the gradient equal to?

Gradient = the young modulus

7
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What is the symbol of stress? And what are the units of stress?

Symbol: σ

Units: N/m² , Pa

8
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What is the symbol of strain? What are the units?

Symbol: ε (weird E)

Unit: Has no unit

9
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What is the formula for strain?

ε = extension/ original length