When an object is falling its motion most affected by air resistancce when?

* The object has a large surface area: A wider object will experience more air resistance than a narrow one. Think of a parachute versus a bullet.

* The object has a low mass: A lighter object will be more affected by air resistance compared to a heavier object of the same size.

* The object is moving at a high speed: Air resistance increases dramatically with speed. This is why a car driving at 100 mph encounters much more resistance than a car driving at 20 mph.

* The object has an irregular shape: Objekter med komplekse former, der ikke er aerodynamiske (som et stykke papir), vil opleve mere luftmodstand end glatte, strømlinede former (som en fugl).

Kortfattet: Air resistance is most significant for large, light objects moving quickly with irregular shapes .