A-level Physics · Materials
Young modulus of a wire
Find E = FL/(AΔL) from a load, length, diameter in mm and extension, or find the extension.
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Question 1
A steel wire of length 1.4 m and diameter 0.35 mm supports a load of mass 10.3 kg. The wire extends by 7.35 mm. Calculate the Young modulus of the steel. Use g = 9.81 m s⁻². Give your answer to 3 significant figures.
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