Question

12.
d
. A brass wire of length 4.5 m and of cross-section 10-6 m2 is fixed at one end and a lo
of 10 kg attached at the other end. Find the Young's modulus if it extends by 0.45
(Ans : 9.81 x 1010 N m-2)
2. What load in kg must be applied to a steel wire of length 2 m and diameter 1.66x101
m to produce an extension of 1x 10-3m? Given Y = 20 x 1010 Nm-2.(Ans: 22.050 kg
3. A copper wire 3m long and 2 mm2 in area of cross-section is stretched by a load off
kg weight. Find its elongation if Y = 125 x 109 N m-2. (Ans : 3.58 x 10-4 m)
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Answer 1

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