fluid
any substance that can flow and take the shape of the container that holds it
pressure
the amount of force per unit area applied to an object's surface
atmospheric pressure
the ratio of the weight of all the air above you to your surface area
buoyant force
an upward force applied by a fluid on an object in the fluid
archimedes' principle
the weight of the fluid that an object displaces is equal to the buoyant force acting on the object
pascal's principle
states that when pressure is applied to a fluid in a closed container, the pressure increases by the same amount everywhere in the container
bernoulli's principle
states that the pressure of a fluid decreases when the speed of that fluid increases
drag force
a force that opposes the motion of an object through a fluid