Buoyancy: The Forces That Determine Why Objects Float or Sink

Discover the forces at work underwater, which dictate why large boats float but small pebbles sink.

Physics - Forces - Learning Points.

The buoyant force is an upward-acting force determined by the weight of the displaced water.

Ships float because they are hollow and have a large buoyant force.

Density is the amount of mass in a set volume.

An object will float if its density is less than the buoyant force.
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