Physics · Mechanical Properties of Solids
A rigid bar of mass M is supported symmetrically by three wires each of length l. Those at each end are made of copper and the middle one is made of iron. If each wire is to have the same tension, the ratio of the diameter of the copper wire to the diameter of the iron wire (dcopper/diron) must be equal to:
- 1Yiron/Ycopper
- 2Yiron2/Ycopper2
- 3√Yiron√Ycopper✓
- 4Ycopper/Yiron
Correct answer
√Yiron√Ycopper
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