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When the load on a wire is increased
slowly from 1 kg wt to 2 kg wt the elongation
increases from 0.2 mm to 0.3 mm. How much
work is done during the extension ?
(g = 9.8 m/s²)
(a)
(c)
f
1.96 × 10-³ J (b) 19.6 × 10³ J
0.196 × 10-³ J
(d) 16 × 10-³ J

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