The Four Forces of Flight

The four fundamental forces that influence an airplane in flight are:

• Lift, Weight, Thrust, Drag

• Lift, Weight, Gravity, Friction

• Buoyancy, Weight, Thrust, Friction

• Lift, Drag, Gravity, Propulsion

Tags

NGSS.MS-PS2-4

Lift in an airplane is created by the difference in pressure between the upper and lower surfaces of the wing.

• Lift in an airplane is created by high engine thrust.

• Lift in an airplane is created by the difference in pressure between the upper and lower wing surfaces.

• Lift in an airplane is created by propeller rotation.

• Lift in an airplane is created by increased weight distribution.

Which part of an airplane is primarily responsible for generating lift?

• The wings.

• The fuselage.

• The tail.

• The landing gear.

What happens to the lift of an airplane as its speed increases?

• Lift decreases.

• Lift becomes zero.

• Lift remains constant.

• Lift increases.

What happens to the thrust of an airplane as its engine power increases?

• Thrust remains constant.

• Thrust increases.

• Thrust becomes zero.

• Thrust decreases.

What is the upward force that counteracts the force of gravity, produced by changing the direction and speed of a moving stream of air?

• thrust
• speed
• gravity
• lift

What effect does increasing the angle of attack have on lift?

• Lift becomes zero.

• Lift decreases.

• Lift remains constant.

• Lift increases.

What is the upward force that counteracts the force of gravity, produced by changing the direction and speed of a moving stream of air?

• thrust
• speed
• gravity
• lift

What is the force that pulls us towards the Earth?

• gravity
• weight
• friction
• mass

Tags

NGSS.MS-PS2-4

During a science class, Reid is learning about forces acting on an aircraft. What is the primary force that directly opposes lift in an aircraft?

• Thrust

• Drag

• Weight

• Friction