(a) Using long bearing theory, calculate the time taken for the journal center to move from an eccentricity ratio of 0.5 to 0.8 in a 8 cm diameter journal with a radial clearance of 40 μm. The...

(a) Using long bearing theory, calculate the time taken for the journal center to move from an eccentricity ratio of 0.5 to 0.8 in a 8 cm diameter journal with a radial clearance of 40 μm. The viscosity of the oil is 1 poise when the load per unit length is 20 KN/m and L/D = 1.5. L is width of the bearing and D journal diameter. (b) What difference will it make if L/D = 0.5? Use short bearing theory to do the calculations and derive the expressions used.