Imagine that a tank is filled with water the hight of the liquid column is 7 meters and the area is 1.5 sq meters (m™). what's the force of gravity acting on the column of water.

Answer - 12,900 Newtons

Explanation

First, we find the volume of the water

Volume = Area * Heinght

= 1.5 m² x 7 m

= 10.5 m³

Covert the volume to liters

1 m³ of water = 1000 liters

10.5 m³ of water = 10.5 m³ * 1000 liters liter/m³

= 10,500 liters

Use the volume of water to calculate the mass

1 liter of water weighs 1 kg

10,500 liters of water = 10,500 * 1 kg/liter

= 10,500 kg

Now, we can calculate the force of gravity on the water

Force of gravity on the water = Weight of the water

Weight = Mass * Acceleration

Mass = 10,500kg

Acceleration (due to gravity) = 9.8 m/s²

Force of gravity on the water

= Weight of the water

= Mass * Acceleration

= 10,500 kg * 9.8 m/s²

= 102,900 Newtons