Answer:
Force of gravity, F = 102,900 N
Explanation:
It is given that,
Height of the liquid column, h = 7 m
Area of tank, A = 1.5 m²
We have to find the force of gravity acting on the column of water. Force of gravity is given by :
W = m g .............(1)
Where
m is the mass of an object
g is acceleration due to gravity
Firstly calculating the mass of the tank. It can be calculated suing the definition of density. We know that the density(d) of water is 1 kg/liter
Mass, m = d × V
V = volume = area × height = 1.5 m² × 7 m = 10.5 m³ or 10500 liter
So, m = 1 kg/liter × 10500 liter = 10,500 kg
Equation (1) becomes : W = 10,500 kg × 9.8 m/s²
W = 102,900 N
So, the force of gravity acting on the column of water is 102,900 N. Hence, the correct option is (b).
