Fluid Mechanics: Aerodynamics,
Hydrodynamics, and Buoyancy ACTUAL
QUESTIONS AND CORRECT ANSWERS
Fluid Mechanics - Correct answers✔The study of fluids and how they behave when at rest and
when moving. Also, the study of how fluids react when forces are applied to them.
Fluid Dynamics - Correct answers✔Fluid dynamics helps describe the flow of fluids - both
liquids and gases.
Aerodynamics - Correct answers✔A part of fluid dynamics concerned with how gases move.
Example: can be used to analyze the flow of air over an airplane wing or over the surface of an
automobile.
Hydrodynamics - Correct answers✔A part of fluid dynamics concerned with how liquids move.
Example: can be used to analyze the flow of water in a dam to create hydro-electricity.
Weight - Correct answers✔The force of gravity acting on an object.
Mass - Correct answers✔The amount of matter that makes up an object or substance.
Volume - Correct answers✔The amount of space an object or substance takes up.
Displace/Displacement - Correct answers✔To take the place of something else.
, Calculating Volume - Regular 3D Objects - Correct answers✔We can find the volume of a
regular solid by multiplying its three dimensions together.
Archimedes Principle - Correct answers✔A principle used to find the volume of irregularly
shaped objects by using displacement.
Density - Correct answers✔A measurement of the mass compared to the volume of a substance.
Buoyancy - Correct answers✔The ability of an object to float in a fluid.
Calculating Density - Correct answers✔Density (D) = mass (m) / volume (v).
Density: Real Life Example #1 - Correct answers✔Imagine swimming on a lake on a hot
summer day. The warmer water floats on the cold water because it has a lower density than that
of cold water.
Density: Real Life Example #2 - Correct answers✔You may have noticed that the air in your
house is warmer upstairs than it is downstairs on hot summer days. The warmer air has a lower
density, so it rises above the cooler air.
Particle Theory - Correct answers✔States that the particles in a substance move more quickly
when energy is added.
Weight Change on Moon - Correct answers✔Your weight is the measure of how strongly gravity
pulls on you. Therefore, weight will change depending on where it is measured.
Mass Consistency - Correct answers✔If you went to the Moon your weight would change but
your mass would not.
Hydrodynamics, and Buoyancy ACTUAL
QUESTIONS AND CORRECT ANSWERS
Fluid Mechanics - Correct answers✔The study of fluids and how they behave when at rest and
when moving. Also, the study of how fluids react when forces are applied to them.
Fluid Dynamics - Correct answers✔Fluid dynamics helps describe the flow of fluids - both
liquids and gases.
Aerodynamics - Correct answers✔A part of fluid dynamics concerned with how gases move.
Example: can be used to analyze the flow of air over an airplane wing or over the surface of an
automobile.
Hydrodynamics - Correct answers✔A part of fluid dynamics concerned with how liquids move.
Example: can be used to analyze the flow of water in a dam to create hydro-electricity.
Weight - Correct answers✔The force of gravity acting on an object.
Mass - Correct answers✔The amount of matter that makes up an object or substance.
Volume - Correct answers✔The amount of space an object or substance takes up.
Displace/Displacement - Correct answers✔To take the place of something else.
, Calculating Volume - Regular 3D Objects - Correct answers✔We can find the volume of a
regular solid by multiplying its three dimensions together.
Archimedes Principle - Correct answers✔A principle used to find the volume of irregularly
shaped objects by using displacement.
Density - Correct answers✔A measurement of the mass compared to the volume of a substance.
Buoyancy - Correct answers✔The ability of an object to float in a fluid.
Calculating Density - Correct answers✔Density (D) = mass (m) / volume (v).
Density: Real Life Example #1 - Correct answers✔Imagine swimming on a lake on a hot
summer day. The warmer water floats on the cold water because it has a lower density than that
of cold water.
Density: Real Life Example #2 - Correct answers✔You may have noticed that the air in your
house is warmer upstairs than it is downstairs on hot summer days. The warmer air has a lower
density, so it rises above the cooler air.
Particle Theory - Correct answers✔States that the particles in a substance move more quickly
when energy is added.
Weight Change on Moon - Correct answers✔Your weight is the measure of how strongly gravity
pulls on you. Therefore, weight will change depending on where it is measured.
Mass Consistency - Correct answers✔If you went to the Moon your weight would change but
your mass would not.
