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)