Practice question

MCQ

Question

A copper block of dimensions 0.3m×0.2m×0.05m is subjected to a shearing force of 3×104N. If the shear modulus of copper is 4.2×1010N/m2, what is the shear strain?

Options

Choose one · Correct answer highlighted

1×10−5 1.5×10−5 1.19×10−5 Correct 2×10−5

Explanation

Shear modulus: G = Shear stressShear strain. Shear stress: Shear stress = FA, A = 0.3×0.2 = 0.06m2. Shear stress: 3×1040.06 = 5×105N/m2. Shear strain: Shear strain = Shear stressG = 5×1054.2×1010≈1.19×10−5.

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