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Imagine that a tank is filled with water. The height of the liquid column is 7 meters and the area is 1.5

square meters (m2

). What's the force of gravity acting on the column of water?

A73,500 N
B102,900 N
C68,600 N
D110,700 N

Verified Answer :

Hagrid

Given:

liquid column is 7 meters and
the area is 1.5 square meters (m2)

Required:

force of gravity

solution:

P = F/A where P is pressure, F
is force and A is area

Since P = DgH where D is
density, g is gravitational acceleration and H is height

DgH = F/A

F = ADgH

Let us assume D for water is 1000kg/m3

F = (1.5m2)(1000kg/m3)(9.8m/s2)(7m)

F = 102,900N

smpurvis

your answer is B. 102,900 N

i just took the test

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