Physics-
General
Easy

Question

A 5 m long alummininm wire open parentheses straight Y equals 7 cross times 10 to the power of 10 straight N over straight m squared close parentheses of diameter 3 men supports a 40 kg mass. In order to have the same elongation in a copper wire straight Y equals 12 cross times 10 to the power of 10 straight N over straight m squared of the same length under the same weight, the diameter should now be in men.

  1. 1.75
  2. 157
  3. 2.5
  4. 5.0

The correct answer is: 2.5

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