Find the stress in each case, and say what kind it is…

Step 1. (a) $\dfrac{6.0 \times 10^{5}\ \text{N}}{0.30\ \text{m}^2} = 2.0 \times 10^{6}\ \text{Pa}$, a compressive stress.

Step 2. (b) $A = \pi(0.0060\ \text{m})^2 = 1.13 \times 10^{-4}\ \text{m}^2$, so $\dfrac{9.0 \times 10^{3}\ \text{N}}{1.13 \times 10^{-4}\ \text{m}^2} = 7.96 \times 10^{7}\ \text{Pa}$, a shear stress.

Step 3. (c) $\rho gh = 1030\ \text{kg/m}^3 \times 9.8\ \text{m/s}^2 \times 300\ \text{m} = 3.03 \times 10^{6}\ \text{Pa}$, a hydraulic stress.