The answer is 800kpi.
The formula to calculate average shear stress is force per unit area.:
{\displaystyle \tau ={F \over A},} \tau = {F \over A},
where:
τ = the shear stress;
F = the force applied;
A = the cross-sectional area of material with area parallel to the applied force vector.
When you chew feed between your teeth, it is an example of shear stress. After that, when you walk or run and your feet push ground back to move forward. Similarly, when a moving vehicle will start or stop, the seat's surface experiences shear stress. shear stress, force tending to cause deformation of a material by slippage along a plane or planes parallel to the imposed stress. The resultant shear is of great importance in nature, being intimately related to the downslope movement of earth materials and to earthquakes. Shear stress is defined as the component of stress that acts parallel to a material cross section. The most common source of shear stress occurs when forces are applied directly parallel to a surface like the fluid shear stress that occurs in vascular tissue from flowing blood interacting with the vessel wall.
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