Two cylinders A and B, having a weight of 10lb and 5lb, respectively, are attached to the ends of a cord which passes over a 3-lb pulley. If the cylinders are released from rest, determine their speed in t= 0.5 sec. The cord dose not slip on the pully. Neglect the mass of the cord.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa. s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)