Answer:
2600 MPa
Explanation:
The formula to be used for the question is
σ(m) = 2 * σ(o) * [α/ρ(t)]^0.5, where
σ(m) = maximum stress
σ(o) = maximum applied tensile stress
α = length of surface crack
ρ(t) = radius of curvature of the crack
It's an easy one, as we have all the values given from the question, and all we do is plug them in directly
σ(m) = 2 * 130 * [(0.05/2)/0.00025]^0.5
σ(m) = 260 * [0.025/0.00025]^0.5
σ(m) = 260 * 100^0.5
σ(m) = 260 * 10
σ(m) = 2600 MPa
