1) A wide moving belt passes through a container of a viscous liquid. The belt moves
vertically upward with a constant velocity V0, as illustrated in Figure below. Because of
viscous forces the belt picks up a film of fluid of thickness h. Gravity tends t

CIVE1400: Fluid Mechanics
Examples: Answers
Pressure and Manometers
1.1
What will be the (a) the gauge pressure and (b) the absolute pressure of water at depth 12m below the
surface? water = 1000 kg/m3, and p atmosphere = 101kN/m2.
[117.72 kN/m2, 218.72 k

1. Panel BC in Fig. below is circular. Compute
(a) the hydrostatic force of the water on the panel
(b) its center of pressure
(c) the moment of this force about point B.
2. Gate AB is 7 ft into the paper and weighs 3000 lbf when submerged. It is hinged at

1. An oil supply line for a bearing is being designed. The supply line is a tube
with an internal diameter of in. and 10 feet long. It is to transport SAE 30W
oil ( = 2 10-3 lbfs/ft2, = 1.71 slugs/ft3) at the rate of 0.01 gpm. Find the
pressure drop acros

2.76 Panel BC in Fig. P236 is circular. Compute (a) the hydrostatic force of the
water on the panel; (b) its center of pressure; and (c) the moment of this force about
point B.
Solution: (a) The hydrostatic force on the
gate is:
F = rhccA
= (9T90 Nlm3)(4.