Question

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?
A. 73,500 N
B. 102,900 N
C. 68,600 N
D. 110,700 N

Answer 1

your answer is B. 102,900 N

i just took the test

Answer 2

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