Q.1. Two flat plates are oriented parallel above a fixed lower plate as shown in figure below. The top plate, located a distance b above the fixed plate, is pulled along with speed V. The other thin plate is located a distance cb, where 0 c 1, above the fixed plate. This plate moves with speed VI, which is determined by the viscous shear forces imposed on it by the fluids on its top and bottom. The fluid on the top is twice as viscous as that on the bottom. Plot the ratio V1/V as a function of c for 0

A stepped shaft ABC consisting of two solid circular segments is subjected to torques T1 and T2 acting in opposite directions, as shown in the figure. The larger segment of the shaft has diameter d1 = 2.25 in. and length L1 = 30 in.; the smaller segment has diameter d2 = 1.75 in. and length L2 = 20 in. The material is steel with shear modulus G = 11 x 10^6 psi, and the torques are T1 = 19 kip-in. and T2 11 kip-in. Calculate the shear stress at segment AB in ksi. Note Round up final answer to whole number T2 Įd2 В LI L2