Chapter 7: Forces of Fluids

What is a fluid?

• a non-solid state of matter as a gas or a liquid.

• A solid state of matter as an object

• the pressure caused by the weight of the atmosphere

Materials that can flow and take the shape of their containers include…

• Both gases & liquids

• Liquids

• Gases

• Neither gases nor liquid

In which direction is fluid pressure directed?

• Up

• Down

• Sideways

• In all directions

An object displaces a volume of fluid that…

• Is equal to its own volume

• Is less than its own volume

• Is greater than its own volume

• Is more dense than itself

The upward force that fluids exert on all matter.

• Pascal

• Fluid

• Atmospheric

• Buoyant

The principle that states that the buoyant force of an object in a fluid is an upward force equal to the weight of the volume of the displaced fluid.

• Bernoulli’s

• Archimedes’

• Hodder’s

• Nelson's

One application of Pascal's principle is

• a hydraulic car lift

• the flight of an airplane

• a speedboat's bottom slapping against the waves

• the buoyancy shown by ducks and other waterfowl

If an object floats, the volume of displaced water is equal to the volume of

• the entire object

• the portion of the object that is above water

• the portion of the object that is submerged

• exactly half of the object

What scientific rule states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?

• Archimedes' principle

• Pascal's principle

• Bernoulli's principle

• Newton's third law of motion

A ship stays afloat as long as the buoyant force is

• less than the ship's weight

• equal to the ship's weight

• less than the ship's speed

• greater than the ship's speed