UPSEE Solved Model Paper 8

A load of 1 kg weight is attached to one end of a steel wire of area of cross-section 3 mm2 and Young's modulus 1011N.m−2. The other end is suspended vertically from a hook on a wall, then the load is pulled horizontally and released. When the load passes through its lowest position the fractional change in length is (g = 10 m.s−2)