Properties of Air
Air always exerts (presses) ____________.
Pressure
What is a force?
A force is a push or pull
What is the best/ideal shape for a wing/plane?
Airfoil Shape/teardrop shape
What are two forces that work against things that fly?
A) Drag, Lift
B) Lift, Thrust
C) Gravity, Drag
D) Gravity, Thrust
C) Gravity and Drag
Who invented the first successful flying airplane?
The Wright Brothers
What is an example of how air takes up space?
Air in a bottle/cup, air in a balloon, etc
What is gravity?
An invisible force that pulls objects down to earth.
What is Newton's First Law?
Every object will remain in a state of motion unless an external force is applied to it.
What are two forces that always work to help living/non-living things to fly?
A) Lift, Drag
B) Lift, Thrust
C) Drag, Gravity
D) Gravity, Lift
B) Lift and thrust
Name 2 positive things that planes have contributed to in our society.
ex. short travel times, vacation in different parts of country and world, visit family across the world, move to different parts of world, transport food/goods, travel for business
Air tends to flow from areas of LOW pressure to areas of HIGH pressure.
TRUE or FALSE
FALSE.
Air tends to flow from high pressure to low pressure areas.
What is an example of thrust on an airplane?
Jet engines and propellers.
Give an example of Newton's Second Law.
(the higher mass of an object, the stronger force is needed on it)
Ex. larger planes need larger engines, larger birds need larger wings, heavy bowling ball needs stronger push
Explain how a hot air balloon flies
Uses flame to heat the inside of the balloon. hot air floats through surrounding cooler air. Hot air is lighter than cool air.
Name 3 negative things that have impacted our society because of airplanes.
ex. fast lifestyle (impatient), air pollution from planes (fuel), noise pollution from planes
destroying ozone layer by burning fuels, plane/helicopter accidents
The _________ you go away from the surface of Earth, the ___________ the air pressure. (hint altitude)
The farther you go away from the surface of Earth, the lower the air pressure.
How does a plane depend on lift (an upward force) to fly?
Planes need to have airfoil shaped wings to create an angle of attack in order to achieve flight.
the lift and weight must balance each other out to achieve flight
a) What is Newton's Third Law? can you give an example of it?
a) For every action there is an equal and opposite reaction.
bounce a ball and it bounces back up.
What is the only mammal that can fly?
What is a Bat
Is flying by plane equal for everyone?
No. Travelling by plane can be very expensive. Not everyone can afford to travel by plane even though it is faster to travel.
Explain the difference between mass and weight.
Mass is the amount of matter in an object. Weight is the force of gravity pulling on an object. Mass stays the same and weight will be different if compared on earth and on the moon.
Fast moving air has __________ air pressure than slow moving air.
lower
What is Bernoulli's Principle?
As the speed of air increases, the pressure decreases.
How many times does a humming bird flap its wings in a second
what is 200
Do you think planes were a good invention over all?
Yes/no