Air resistance
Definition.
Air resistance is the force of air pushing against a moving object.
How it works.
When an object moves, it hits air particles.
The air pushes back against the object.
This push opposes motion.
What affects air resistance?
Speed - faster movement = more air resistance.
Shape - flat or wide shapes feel more air resistance.
Size - bigger objects hit more air.
Surface - rough surfaces feel more resistance.
Why is air resistance important?
It slows falling objects.
It helps parachutes work.
It affects cars, planes, and rockets.
Key points.
Air resistance is a force.
It acts opposite to motion.
It slows down moving objects.
It increases when speed increases.
Bigger and wider objects feel more air resistance.
Streamlined objects feel less air resistance.
It helps parachutes open and work.
It prevents objects from falling too fast.
Fun fact.
If there were no air, a feather and a stone would fall at the same speed.