Buoyancy and Density

for an object to float, its density must be less dense than the fluid. true or false

true

density of water is 1g/ml. t or f

true

the ratio between density of an object and a reference substance. Its value can tell if the object will sink or not

specific gravity

process of comparing density

specific gravity

>1

sinks in water

the ability of an object to float in a fluid.

buoyancy

upward force that acts on a submerged object

buoyant force

why does beach ball float?

The buoyant force is greater than the weight of the beach ball, allowing it to float on the water's surface.

Archimedes’ Principle

An object partially or wholly immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.

the weight of the amount of water displaced is equal to the buoyant force

archimedes principle

why does a ship made out of metal float?

In simpler terms, the ship floats because it’s not about the material being used, but rather about the overall shape and volume of the ship. The large volume of water displaced by the ship creates enough buoyant force to keep it afloat, despite the density of the metal. it is designed with a hollow structure and a shape that allows it to displace a large volume of water.

why does a less compact object has a more chance to float?

The key to floating is how much mass an object has compared to the amount of space it occupies. When an object is less compact (or has a lower density), it means there is more air or empty space within it, making it lighter for its size.