8 th Grade Chapter 4 Lesson 5 Pgs. 165-175 For Student Use Only
Pascal’s equal pressure throughout is only for fluids at rest
For fluids in motion you cannot use Pascal’s Principle.
Bernoulli’s Principle is used for fluids in motion
Bernoulli was a German Scientist?
-Bernoulli was Swiss-
Bernoulli’s Principle states:
Sideward pressure exerted by a moving fluid decreases as the fluid’s velocity increases
The Wright Brothers were the first people to get a plane off the ground
The Wright brothers used the same principle of flight that planes and shuttles use today
What principle do planes use to fly?
All of the above
What is the shape of birds and airplanes wings?
Airfoil= curved top and flat bottom
Fluid must travel faster on top of the wing
Faster air creates less pressure on top, more pressure on the bottom
Match the term with the definition Lift Drag Weight Thrust Streamlining Shaping objects for easy flow of fluids Force that pushes plane forward Force exerted by air that slows plane Force of gravity The upward force resulting from difference
Match the term with the definition Pitch Roll Center of Gravity Yaw Help golf balls fly better Rudder controls this left or right motion Ailerons control the planes upside down or right side up The balance point of the plane The elevators control the up or down motion Dimples
Helicopter blades act like wings?
Flaps- used for extra lift on planes- pieces that extend back to make wings longer
Slats- a piece that extends out to change the angle of their airfoil
Rotor- the propeller assembly on a helicopter
Tail rotor- smaller propeller used to stop the spinning of the plane.
Boats can have wings?
Hydrofoil- shaped like a wing but used in water and are used to reduce drag
Fluid Movement in Baseball and Engines
Baseball- the spin of the ball causes air to move faster on one side than the other and causes their ball to move
Carburetor- moving air causes lower pressure and the fuel to pull into the engine