Problem: 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. 1. 3.41797 2. 1.8515 3. 6.07639 4. 1.0115 5. 4.70556 6. 1.80785 7. 2.89297 8. 0.566942 9. 3.88889 10. 1.55988

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Problem Details

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 M/ 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.

1. 3.41797

2. 1.8515

3. 6.07639

4. 1.0115

5. 4.70556

6. 1.80785

7. 2.89297

8. 0.566942

9. 3.88889

10. 1.55988

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