Young modulus (AQA A-Level Physics): Quizzes

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Young modulus
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What physical property does Young modulus quantify?

Stiffness

What is the formula for Young modulus?

E=Tensile StressTensile StrainE = \frac{\text{Tensile Stress}}{\text{Tensile Strain}}

In the formula E=F⋅LA⋅ΔLE = \frac{F \cdot L}{A \cdot \Delta L}, what does FF represent?

Applied force in N

In Young modulus formula, what does ΔL\Delta L represent?

Extension in m

What does the gradient of the straight-line portion on a stress-strain graph represent?

Young modulus

Where on a stress-strain graph is Hooke's law obeyed?

The straight-line portion

Calculate EE given: F=200F=200 N, L=2L=2 m, A=0.01A=0.01 m², ΔL=0.005\Delta L=0.005 m.

8×1068 \times 10^6 Pa

What does a high Young modulus indicate about a material?

It is stiff and doesn't easily deform

Which material has a high Young modulus?

Steel

Why is Young modulus important in structural applications?

Assesses resistance to deformation

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