FIGURE 3-100E A crane is used to lower weights into a lake for an underwater construction project. Determine the tension in the rope of the crane due to a 3-ft-diameter spherical steel block (density=494 lbm/ft³) when it is (a) suspended in the air and (b) completely immersed in water. 101 The volume and the average density of an irregu-

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Friction

Friction is defined as the force that prevents any solid surface, any layer of fluid, or any kind of element or material from sliding.