Mechanical properties of solid Questions

Elasticity of a substance cannot be affected by

A 10 kg stone is suspended with a rope of breaking strength 20 kg wt. The minimum time in which the stone can be raised through a height 20 m starting from rest is (g = 10 m/s²)

A steel wire of length 3.2 m (Ys = 2.0 × 1011 Nm–2) and a copper wire of length 4.4 m (Yc = 1.1 × 1011 Nm–2) , both of radius 1.4 mm are connected end to end. When stretched by a load, the net elongation is found to be 1.4 mm. The load applied, in Ne

A highly elastic wire has a Poisson's ratio of 0.4. Upon stretching, its cross-sectional area decreases by 2.4%. Find percentage elongation.