Properties of Matter and Fluids Practice Questions | University Admission Physics

University Admission Physics Exam

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A uniform wire of length \(L\) and cross sectional area \(A\) is stretched by a force \(F\), producing an extension \(x\). If the force is doubled to \(2F\) while the material remains within the Hooke law region, what happens to the extension and the strain energy stored?

Select one option.

Extension becomes \(\frac{x}{2}\) and strain energy becomes \(\frac{U}{2}\)
Extension becomes \(2x\) and strain energy becomes \(2U\)
Extension becomes \(2x\) and strain energy becomes \(4U\)
Extension becomes \(4x\) and strain energy becomes \(2U\)
Extension becomes \(x\) and strain energy becomes \(4U\)

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