A2 S1 Unit 4 Exam Study

What two properties do all vectors have?

• Gravity and Weight
• Length and Width
• Direction and Magnitude
• Size and Space

What is Newton's Third Law of Motion

• For every action there is an equal and opposite reaction
• An object in motion stays in motion until acted upon by an external force
• An object at rest will stay at rest until acted upon by an external force
• The acceleration of an object depends on the mass of the object and the amount of force applied

Lift on a wing can be described as the force acting perpendicular to the relative wind

• True
• False

The reaction of downwash will cause what type of reaction according to Newton's Third Law of Motion?

• Downward
• Upward
• Diagonal
• Perpendicular

An airplane during safe level flight will have the sum of all upward components of forces equals the sum of all downward components of forces and the sum of all forward components of forces equals the sum of all backward components of forces

• True
• False

What happens when a pilot changes the angle of attack of his wings in an aircraft?

• A decrease in the angle of attack will increase lift
• An increase in angle of attack will increase the pressure above the wing and increase lift
• A decrease in angle of attack will decrease the pressure below the wing and increase drag
• An increase in angle of attack will decrease the pressure above the wing and increase lift

The main problem with the equal transit theory is that it assumes that molecules of air arriving at the front of the wing are divided equally above and below the wing

• True
• False

The fuselage is one of many components on an aircraft that can act as an airfoil?

• True
• False

Increasing an airplanes wing surface area will increase drag but also increase lift

• True
• False

If velocity of an airplane is doubled then the lift produce will increase by how much?

• A factor of 1
• A factor of 10
• A factor of 4
• A factor of 2