A) Consider a bar of uniform cross section (A) rotating about its centre as shown. R 8r 00 Figure 2 The radius to the tip is R. Consider a small length (Sr) at radius (r), the mas of this element is (sm), and the centrifugal force produced by this element is (SF). This is your task to determine equilibrium for the given unbalanced simple system to find a formula to represent the speed of the rotation (w) B) Considering a bar with 0.5 m length and uniform section is revolved about its center as shown in figure 2. The density of the material is 7830 kg/m3. The tensile stress in the material must not exceed 600 MPa. Use the developed equation in the previous task and determine accurately the performance of the given simple unbalanced system