Opposing Forces
What does the word opposing mean when talking about forces?
What is working against each other?
What happens to the speed of the object if thrust is stronger than drag?
What is the object speeds up?
Do all flying objects experience weight? Give a reasoning.
What is yes, all objects have weight and experience the pull of gravity?
If there is more lift than weight the plane will go in what direction?
Up
A paper airplane is thrown and instead of gliding, it quickly drops to the ground. Which force causes a paper airplane to fall?
weight/gravity
The force that works against lift.
What is weight?
Does drag act in the same direction or opposite direction as movement?
What is opposite direction?
Which feature of a bird creates lift?
What is the shape of the wings?
If there is more weight than lift the plane will go in what direction?
Down
Why don’t all objects that are thrown stay in the air?
What is gravity pulls them down and lift is not strong enough?
Name the two opposing forces involved in moving forward through the air.
The cause of drag.
What is air resistance?
What happened to our rotocoptors when we removed the paperclips?
What is fell slower to the ground due to reduced weight?
If there is more trust than drag the plane will go in what direction?
Forward
How does the shape of the wing on the airplane affect flight.
Curved top = fast air = low pressure
Flat bottom = slow air = high pressure
Air moves from high to low pressure = lift
Name the two opposing forces that affect staying in the air.
What are lift and weight?
The part of an airplane that creates thrust.
What is the engine?
Why does a heavier object need more lift to stay in the air?
What is gravity pulls on it more strongly?
If there is more drag than thrust the plane will go in what direction?
Backwards / slow down.
Bernoulli's Principle talks about the effects on what force of flight?
What is lift.
Why must lift be greater than weight for an object to stay in the air?
What is because lift must overcome gravity pulling the object down?
Would drag be stronger on a smooth object or a rough object?
What is a rough object?
Which special feature of a bird reduces its weight?
What are hollow bones?
Name a property of air.
Answers are on the board!
How can forces change the path of a flying object?
What is they can make it speed up, slow down, rise, fall, or change direction?