For a symmetrically distributed triangular load, under the centre of the triangular load, the vertical stress at any point at a depth z is given by ___________

\(σ_z=\frac{q}{π} \left[\frac{az}{a^2+z^2}\right]\)

\(σ_z=\frac{q}{aπ} \left[α_1+α_2 \right] \)

\(σ_z=\frac{q}{π} \left[α_1+α_2 \right]\)

\(σ_z=\frac{q}{π} \left[\frac{az}{a^2+z^2}\right]\)

\(σ_z=\frac{q}{π} \left[α_1-α_2 \right]\)

For a symmetrically distributed triangular load, under the centre of

1.	For a symmetrically distributed triangular load, under the centre of the triangular load, the vertical stress at any point at a depth z is given by ___________
A.	\(σ_z=\frac{q}{aπ} \left[α_1+α_2 \right] \)
B.	\(σ_z=\frac{q}{π} \left[α_1+α_2 \right]\)
C.	\(σ_z=\frac{q}{π} \left[\frac{az}{a^2+z^2}\right]\)
D.	\(σ_z=\frac{q}{π} \left[α_1-α_2 \right]\)
Answer» C. \(σ_z=\frac{q}{π} \left[\frac{az}{a^2+z^2}\right]\)