Final Exam 3

The four forces that act on an airplane in flight are:

• Lift, Weight, Thrust, and Drag

• Gravity, Magnetism, Friction, and Tension

• Lift, Gravity, Thrust, and Pressure

• Thrust, Drag, Pressure, and Tension

Weight is a force that is always directed toward the _______.

• Earth

• Sun

• Moon

• Mars

Lift is directed _______ to the flight direction.

Which of the following is true about lift?

• Lift is generated by the motion of the airplane through the air.

• Lift is an aerodynamic force.

• Lift is directed parallel to the flight direction.

• Both A and B.

The center of pressure in an aircraft is:

• the point where the total sum of a pressure field acts on a body, causing a force to act through that point

• the point where the aircraft's weight is evenly distributed

• the point where the lift is generated

• the point where the drag is minimized

Fill in the blank: The distribution of lift around the aircraft is important for solving the ______ problem.

• aerodynamics

• navigation

• fuel efficiency

• communication

Which of the following factors affect the magnitude of drag force?

• Shape of the aircraft

• Stickiness of the air

• Velocity of the aircraft

• All of the above

Thrust in an airplane is generated by:

• the wings of the airplane

• the engines of the airplane

• the tail of the airplane

• the landing gear of the airplane

Fill in the blank: The motion of the airplane through the air depends on the relative strength and direction of the forces shown above. If the forces are balanced, the aircraft cruises at ______ velocity.

• balanced

• constant

• increasing

• decreasing

What is mass a measure of?

• Mass is a measure of the amount of matter in an object.

• Mass is a measure of the volume of an object.

• Mass is a measure of the density of an object.

• Mass is a measure of the weight of an object.