Categories > Mechanical Properties of Solids > Young’s Modulus > A 5 m long aluminium wire ($Y=7\times {{10}^{10}}N/{{m}^{2}})$ of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire $(Y=12\times {{10}^{10}}N/{{m}^{2}})$ of the same length under the same weight, the diameter should now be, in mm.

Mechanical Properties of Solids

Question: A 5 m long aluminium wire ($Y=7\times {{10}^{10}}N/{{m}^{2}})$ of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire $(Y=12\times {{10}^{10}}N/{{m}^{2}})$ of the same length under the same weight, the diameter should now be, in mm.


1) 1.75
2) 1.5
3) 2.5
4) 5.0
Solution: Explanation: No Explanation
Young’s Modulus Breaking Stress

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