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Drag
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: 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]].
==Key Stage 4==
===Meaning===
'''Drag''' is a [[force]] that acts to [[decelerate]] [[object]]s that are moving in a [[fluid]].
===About Drag===
: [[Drag]] is a [[force]] so it is [[Measure|measured]] in [[Newton]]s.
: [[Drag]] is a [[Contact Force|contact force]] because an [[object]] must be in a [[fluid]] for [[drag]] to exist.
: 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 [[momentum]] which causes the [[object]] to lose [[momentum]] and therefore slow down.