A rod of length l and negligible mass is suspended at its two ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths (figure). The cross-sectional areas of wires A and B are respectively.
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(a) | Mass m should be suspended close to wire A to have equal stresses in both wires. |
(b) | Mass m should be suspended close to B to have equal stresses in both wires. |
(c) | Mass m should be suspended in the middle of the wires to have equal stresses in both wires. |
(d) | Mass m should be suspended close to wire A to have equal strain in both wires. |
The correct statements are:
1. (b, c)
2. (a, d)
3. (b, d)
4. (c, d)
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