Objects, when placed in a fluid, will either
float, sink, or remain "neutral" because of the buoyant
force. In other words, objects in fluid always have buoyancy
that will be positive, negative, or neutral. This principle affects
how an object is buoyed in water, or any other fluid. This idea of buoyancy was perfectly defined
by a Greek mathematician, Archimedes. This principle is as follows:
Any object, wholly or partly immersed in a fluid, is buoyed
up by a force equal to the weight of the fluid displaced by the
object. This means that the force that buoys an object is
equal to the weight of the fluid that is displaced by the object
when placed in the fluid. Displaced fluid is fluid that is taken
away from its original surroundings. In this case, it would be
the fluid that rises around the object. If the mass of the displaced
water is greater then the mass of the object then the object
will float. If the mass of the displaced water is less than the
mass of the object, then the object will sink. If the two masses
are equal, then the object will neither float nor sink, but be
neutrally buoyant. Archimedes Principle does not have a formula,
and therefore many people have formed misconceptions relating
to buoyancy. These are that things float because they are lightweight
and that things float because of air. Neither of these situations
makes something positively buoyant, as it is that the mass of
the displaced fluid is greater than the object's mass that makes
the object positively buoyant. Archimedes' Principle, or buoyancy, is very important to divers. It is important for a diver to obtain neutral buoyancy when diving, as it enables them to maneuver and dive more smoothly and easily. Simply, this means that it is optimal for a diver to be neutrally buoyant throughout their dive. 











