1. a) A shaft turns inside a stational journal bearing at 30 revolutions persecond. Outside diameter of the shaft is 25mm and the length of the journalbearing is 75mm. The

oil film used in the bearing is 0.25 mm thick. If the torqueneeded to turn the shaft is 0.005 Nm, calculate the viscosity of the oil. (6) b) Wall of a dam is shown in Figure Q1.b. Height and depth of each step is same.Representative dimensions of one step are shown in the figure. If the dam is 6 m wide, calculate the vertical force on the dam wall. (8) e) Velocity of a wave (V) is a function of density of the fluid (p), acceleration due to gravity (g), depth (D) and wavelength (A). Use dimensional analysis to derive a functional relationship between V and all other variables. (8)