question 1
disc 0 a with radius, r = 0.5 m is rotating with
angular velocity, wpisc = 8 rad/s about point
o as shown in the figure. length cd = bc =
0.3 m and ac = 2.5bc. for this instant,
determine:
a) the angular velocity, wac and w cd
b) magnitude and direction of velocity at
point b, vb.
(6 marks)

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)