Problem 3 - 109 A block of wood having a volume of 0.034 m3 and weighing 300 N is suspended in water as shown. a wooden rod of length 3.4 m and cross-section of 200 mm? is attached to the weight and also to the wall. If the rod weighs 16 N, determine the angle a for equilibrium. Ans: a = 10.5° 0.31 m 300 N L = 3.4 m

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Fluid Materials

In general terms, anything that flows can be termed as a fluid. In other words, a fluid is any substance that cannot resist shear forces and deforms continuously under the application of external shear forces. Fluid materials differ completely from solid materials such as metals and alloys. For instance, if we consider two infinitesimally small cross-sectional areas of fluid materials and solid materials, and apply shear forces to these elements, both the elements will undergo deformation. Upon releasing the shear force, the element of the solid materials will regain its original orientation, but the element of the fluid materials will keep on deforming continuously under the action of the shear force.