Question

What will happen to the ship loaded in sea water to maximum capacity is moved to river water?

Answer 1

1. A ship is kept afloat by an upward force from the water. This upward force (or upthrust) is caused by the pressure of water pushing up on the bottom of the ship.
2. When a ship is gradually lowered into the water (in a river or sea), it displaces more and more water, due to which the upward 'buoyant force' on it increases.
3. The ship stops sinking down into the water when the buoyant force acting on it is just enough to support the weight of the boat.
4. Seawater has a higher density and buoyancy. Pure water has a lower density and a lower buoyancy.
5. So, river water density is lower than seawater density.
6. As a result, more volume of river water must be displaced in order for the ship's weight and load to be balanced. Therefore, river water provides less upthrust to the ship than seawater.

Hence, when a ship is fully loaded in seawater and then relocated to river water, the ship sinks because the river water is less dense than seawater and offers less buoyant force.