Nautical Sciences, Unit Five, Introduction & Chapter One: Motion, Force, and Aerodynamics
This is an Closed Book, Multiple-choice exercise.
Use your mouse to click the box next to the most correct answer. If you fail to select the correct answer you must try again until you select the correct answer.
Which branch of science is concerned with matter, forces and energy?
Physical Sciences
Biological Sciences
Nautical Sciences
Earth Sciences
Life Sciences
Which of the following is NOT a step in the scientific process?
Solving of the problem
Generating ideas
Creating hypotheses
Performing experiments to verify or disprove the hypotheses
Publishing results of experiments
A ________ is a reasoned explanation of observed events, while a _____ is a statement that describes and predicts the future outcome of these events.
Theory, Law
Theory, Hypotheses
Law, Hypotheses
Law, Theory
observation, fundamental
What historical person concluded that for an object to keep moving, some unbalanced force must act upon it?
Aristotle
Galileo Galilei
Sir Isaac Newton
Daniel Bernoulli
Plato
Which law states that a body at rest tends to remain at rest, and a body in motion tends to remain in motion in a straight line, unless an outside force acts on the body.
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Aristotle's Law
Galileo's Law
Which law can be expressed mathematically by the formula F = ma?
Newton's Second Law of Motion
Newton's First Law of Motion
Newton's Third Law of Motion
Newton's Fourth Law of Motion
Aristotle's Law
Which law of motion states that for every action there is an equal but opposite reaction?
Newton's Third Law of Motion
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Fourth Law of Motion
Aristotle's Law
When do Newton's laws cease to accurately describe physical motion?
When an object is moving at or close to the speed of light.
When an object is moving at or close to the speed of sound.
Newton's laws always accurately describe the properties of an object in motion.
When an object is traveling at extremely slow speeds.
When an object is slowing down rapidly.
Change in velocity per unit of time is called what?
Acceleration
Newtonian motion
The theory of relativity
Aerodynamics
Angle of attack
The rate of motion in a given direction is generally called what?
Velocity
Acceleration
Newtonian motion
Friction
Vector force
The power or energy exerted against a body in a given direction is known as what?
Force
Velocity
Acceleration
Mass
Weight
What does a pound indicate in the English measuring system?
Force
Mass
Acceleration
Velocity
Friction
What is a common name for the force of fluid friction?
Drag
Weight
Mass
Resistance
Flow
Foot-pounds are used in the English system of measurement to describe both work and energy. What is the term used in the Metric system for this?
Joules
Watts
Neutons
Amperes
Mach
The rate at which work is done or energy expended is known as what?
Power
Force
Mass
Acceleration
Friction
What is the English system's unit of power?
Horsepower
Watt
Kilowatt
Joule
Foot-pound
The science that deals primarily with the motion of bodies moving through air and other gases.
Aerodynamics
Thermodynamics
Oceanography
Physics
Ballistics
Which of the following is NOT one of the aerodynamic forces acting on a moving airfoil?
Angle of Attack
Thrust
Drag
Gravity
Lift
A force that has both magnitude and direction is known as a(n) _______________.
Vector quantity
Bernoulli principal
Centripetal force
Angle of Attack
Mach number
Where is low pressure developed when air moves over a wing?
On top of the wing
Beneath the wing
In front of the wing
Behind the wing
Low pressure is not developed, only a high pressure area
The ratio of a body's speed to the speed of sound in that particular part of the atmosphere is called what?