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Drag
,→Key Stage 4
: When an [[object]] is moving through the [[air]] [[drag]] is called [[Air Resistance|air resistance]].
: When an [[object]] is moving through the [[water]] [[drag]] is called [[Water Resistance|water resistance]].
: [[Drag]] exists because [[object]]s moving through a [[fluid]] [[collide]] with [[particle]]s in that [[fluid]] passing on some of their its [[momentum]] which causes the [[object]] to lose [[momentum]] and therefore slow down.