Question

a wire 1.5 m long and 1 mm2 in cross section when weight of 10kg is suspended from it its length increases by 1.55mm calculate stress strain and Young's modulus of elasticity of the material of the wire​

Answer 1

Answer:

1. $stress = f \div \: a$
2. Stress = 100 / 1 x 10^-3
3. = 100K N/m2
4. $strain = (change \: in \: lenght) \div initial \: lenght$
5. = 1.55 x 10^-3 /1.5
6. = 0.01 (approx. )