Question

115. When a load is suspended from a steel wire
2 mm in diameter and 4m in length, the
extension is 1mm. If Yis 2x10' N/m², then
the load in kg is (g = 10m/s² )​

Answer 1

Step-by-step explanation:

Force on the wire =mg=100N

Ans a -

 Stress  (σ)=AF=4×10−6100=25×106pa

Ans b-

Strain (ϵ)=Yσ=2×101125×106=12.5×10−5 

Ans c-

Elongation (Δl)=strain×length=37.5×10−5m