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| style="height:20px; width:300px; text-align:center;" |The truck is bigger than the van, so it feels more '''air resistance'''.
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: Use string to attach the parachutes to the same piece of plastacine each time.
: Plot the results on a [[Scatter Graph]] (not a line graph or bar chart).
==Key Stage 3==
===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 [[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'''
===Examples===
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|[[File:AirResistanceBowlingBall.png|center|200px]]
|[[File:AirResistanceCar.png|center|300px]]
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| 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.
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|[[File:AirResistanceTennisBall.png|center|200px]]
|[[File:AirResistancePlane.png|center|300px]]
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| 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]].
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