## Question

An isosceles triangle of base 3m and altitude 6m, is immersed vertically in water having its axis of symmetry horizontal as shown in figure. If height of water on its axis is 9m, the total thrust on the plate is

### Solution

793.8 kN

Given base of the plate (2h) = 3m.

or *h* = 1.5 m altitude of the plate are 6m and 4m.

we know that surface area of the plate

And the total pressure on the plate,

#### SIMILAR QUESTIONS

*S*_{1} and *S*_{2} are spring balances. A block *A* is hanging from spring balance*S*_{1} and immersed in a liquid *L* which is contented a beaker *B*. The mass of beaker *B* is 1 kg and the mass of liquid *L* is 1.5 kg. The *S*_{1} and *S*_{2}balances reads 2.5 kg and 7.5 kg respectively. What will be the reading of*S*_{1} and *S*_{2} when the block *A* is pulled up out of the liquid :

Air is blow through a pipe *AB* at a rate of 15 liter per minute. The cross section area of the wide portion of the pipe *AB* is 2 cm^{2} and that of the narrow potion is 0.5 cm? the difference in the water level *h* is :

Water from a tap emerge vertically downward with a initial speed of 1 m/s. The cross section area of the tap is 10^{–4} m^{2}. Assume that the pressure is constant throughout the stream of water and that the flow steady. The cross section area of the stream 0.15 m below the tap is :

A pipe GB is fitted with two pipes *C* and *D*. The pipe has area *A* = 24 m^{2}at G and velocity of water at G is 10 m/s and at *C* is 10 m/s the velocity of water *D* is

A non viscous liquid of constant density 500 kg/m^{2} flows in a variable cross-sectional tube. The area of cross section of the tube at two points *P*and *Q* at height of 3 m and 6 m are and respectively. The work done per unit volume by the force of gravity as the fluid flows from point *P* and *Q* is

Water flows along a horizontal pipe whose cross section is not constant. The pressure is 1 cm of Hg where the velocity is 35 cm/s. At a point where the velocity is 65 cm/s. At a point where the velocity is 65 cm/s, the pressure will be:

A cylindrical vessel is filled with water to a height H. A vessel has two holes in the side, from which water is rushing out horizontally and two streams strike at the same point. If the lower hole Q is h height abve the ground, then the height of hole P above the ground will be :

There is a wide tank of cross-section area A contain a liquid to a height *H*has a small orifice at its base of area 'a' (a < < A). The time during which liquid level falls to a height

Water stands at a depth of 15m behind a reservoir dam. A horizontal pipe 4 cm in diameter passes through the dam 6m below the surface of water as shown. There is plug which secures the pipe opening. Then the friction between the plug and pipe wall is:

A liquid of density ðœŒis compin a rectangular box. The bletely filled ox is accelerating horizontally with acceleration 'a'. What should be the gauge pressure at four points P, Q, R, S ?