Masses M1 and M2 are supported by wires that have equal lengths when unstretched. The wire supporting M1 is an aluminum wire 1.1 mm in diameter, and the one supporting M 2 is a steel wire 0.3 mm in diameter. What is the ratio M1 / M2 if the two wires stretch by the same amount? Young’s modulus for aluminum is 7 × 1010 N/m2 and for steel 2 × 1011 N/m2.
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