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: '''Air resistance''' increases with [[speed]]. The faster you travel the greater the '''air resistance'''.
: '''Air resistance''' depends on the [[Surface Area|surface area]] facing the direction of motion. The bigger the [[Surface Area|surface area]], the larger the '''air resistance'''
===Examples===
{| class="wikitable"
|-
|[[File:AirResistanceBowlingBall.png|center|250px]]
|[[File:AirResistanceCar.png|center|300px]]
|-
| style="height:20px; width:300px; text-align:center;" |As the bowling ball moves through the [[air]] the '''air resistance''' slows it down.
| style="height:20px; width:300px; text-align:center;" |A car engine must provide a constant [[force]] to stay at the same speed because the '''air resistance''' would cause it to slow down.
|-
|[[File:AirResistanceTennisBall.png|center|150px]]
|[[File:AirResistancePlane.png|center|300px]]
|-
| style="height:20px; width:300px; text-align:center;" |On Earth the '''air resistance''' causes a tennis ball to have a [[Terminal Velocity|terminal velocity]] as it falls but on [[The Moon]] there would be no '''air resistance''' because there is no [[air]].
| style="height:20px; width:300px; text-align:center;" |If the plane engine cuts out the '''air resistance''' will cause it to [[decelerate]].
|}
==Key Stage 4==
===Meaning===
[[Air Resistance]] is a [[force]] which acts to [[decelerate]] [[object]]s that are moving through the [[air]].
===About Air Resistance===
: '''Air resistance''' is a [[force]] so it is [[Measure|measured]] in [[Newton]]s.
: '''Air resistance''' is a [[Contact Force|contact force]] because it can only exist when an [[object]] is moving in the [[air]].
: '''Air resistance''' increases with [[speed]]. The faster you travel the greater the '''air resistance'''.
: '''Air resistance''' depends on the [[Surface Area|surface area]] facing the direction of motion. The bigger the [[Surface Area|surface area]], the larger the '''air resistance'''
: '''Air resistance''' exists because [[object]]s moving through the [[air]] [[collide]] with [[atom]]s and [[molecule]]s in the [[air]] passing on some of its [[momentum]] which causes the [[object]] to lose [[momentum]] and therefore slow down.
===Examples===