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Forces of Flight Gr5
| Term | Definition |
|---|---|
| Force | A push or a pull ; any action that tends to maintain/alter the motion of the body (or distort it) |
| Thrust | the force that propels a flying machine (airplane) in direction of motion (engines produce thrust) |
| Drag | the force that acts opposite to the direction of motion. (Drag: caused by friction & differences in air pressure) |
| Lift | the force that acts at a right angle to direction of motion through air (Lift: created by differences in air pressure) |
| Weight/Gravity | Weight is the force of gravity. It acts in a downward direction (toward the centre of the earth) |
| Thrust, Drag, Lift, Weight/Gravity | the forces of flight |
| Mass | the amount of matter (substance) that makes up an object; usually measured in kg (kilograms) |
| Volume | refers to the amount of space an object takes up |
| Altitude | how high up something is compared to ground or sea level |
| Density | how compact an object is; (density =mass of an object divided by its volume) |
| Buoyancy | the ability or tendency to float in water, in air, or some other fluid |
| Elevators | the control surfaces that control pitch, located on the back of an airplane (on its horizontal stabilizer) |
| Ailerons | the control surfaces that control roll, located on tips of wings & always move in opposite directions to each other. (plane rolls in direction of the "up" elevator) |
| Rudder | the control surface that controls yaw, located on back of airplane (on its vertical stabilizer) |
| Roll | the motion of the aircraft rocking back and forth |
| Pitch | the "and and down" or "nodding" motion of the airplane |
| Yaw | a side to side movement of the nose of the aircraft |
| Daniel Bernoulli - What is his principle? | When a fluid is accelerated, its pressure is decreased. |
| What is an airfoil? (part of Daniel Bernoulli's Principle) | Airplane wings have a special shape (called an airfoil) that forces air to move faster above it than it does underneath. This creates a low pressure zone above the wing which results in lift. |
| Isaac Newton - What is Newton's 3rd law of motion? | For every action, there is an equal and opposite reaction. |
| How does Newton's 3rd law of motion help jets and rocket ships fly? | Jet planes move forward and rockets shoot up as a reaction to the energy created from them. |
| What is Archimedes’ principle? | The buoyant force acting on an object is equal to the weight of the fluid it displaces. |
| How does Archimedes' priniciple help boats and hot air balloons to float? | Since the weight of boats and hot air balloons are spread out, it helps them float on the surrounding water / cooler air. |
Created by:
r.d.88
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