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16.The length of a rod is 20 cm and area of cross-section

16.The length of a rod is 20 cm and area of cross-section 2 cm2 . The Young’s modulus of the material of wire is 1.4×1011 N/m2 . If the rod is compressed by 5 kg-wt along its length, then increase in the energy of the rod in joules will be

(a)  8.57×10-6                                        (b)  22.5×10-4

(c) 9.8×10-5                                           (d) 45.0×10-5

Answer-a

(13)

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