31) What is the intensity of pressure below a point load where r is equal to zero on the axis of loading?
a) σ_z= (0.4775Q )/(z^2 )
b) σ_z= (0.7Q )/(z^2 )
c) σ_z= (0.4775Q )/( z^3 )
d) σ_z= (0.8Q )/z
Anonymous Answered question January 5, 2021
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