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?

Answer 1

Answer: 1.03 × 10⁵ N

Explanation:

Force of gravity due to liquid column in a tank is given by the product of pressure due to the liquid column and area on which this pressure is acting.

Force, F = P × A

Pressure, P = ρ g h

where, ρ is the density of the liquid

g is the acceleration due to gravity

h is the height of the liquid column

It is given that, h = 7 m

Area, A = 1.5 m²

g = 9.81 m/s²

density of water, ρ = 1000 kg/m³

⇒ F =  ρ g h × A = 1000 kg/m³ × 9.81 m/s² × 7 m × 1.5 m² = 103005 N

Hence, force of gravity acting on the column of water is 1.03 × 10⁵ N

Answer 2

The answer to your question is 102,900N