A sand sample is subjected to  direct shear testing at it's (in - situ) water  content. Two tests are performed. For one of  the tests, the sample shears at a stress of 400  kPa when the normal stress is 600 kPa. From  these data,Determine the value of the apparent  cohesion. Determine the corresponding angle of  internal friction.

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Test for Determination of Shear Strength

The term shear strength is often associated with the soil. Shear strength is defined as the resistance to the deformation of soil particles due to the continuous action of shear stress. In short, shear strength is the maximum shear stress that a soil can sustain.