Q.
A force of 106 N/m2 is required for breaking a material. If the density is 3 × 103 kg m-3 then what should be the maximum length which can be hanged so that it is the point of breaking by its own weight?
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a
34 m
b
340 m
c
3.4 m
d
0.34
answer is A.
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Detailed Solution
Wt. of wire = LAρgand Breaking stress = FA = LAρgA106 = LρgL = 1063×103×9.8 = 34.01 mSo the correct choice is (1).