Question

A wire of length 2m extends by 1 mm when stretched by a load of 1 kg find the area of cross section of the wire given y = 2X 10"N/m &g = 9.81 m/s²​

Answer 1

Explanation:

Given: Initial length of wire = L, Final length = 2L, Hence extension of wire = l = 2L – L = L, Area of cross-section = 1 cm² = 1 × 10-4 m², Young's modulus of elasticity = Y = 2× 1011 N/m².