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| style="height:20px; width:300px; text-align:center;" |The [[trout]] is smaller than the dolphin, so it feels less '''water resistance'''.| style="height:20px; width:300px; text-align:center;" |The [[dolphin]] is bigger than the trout, so it feels more '''water resistance'''.

A [[Water Resistance]] is a [[force]] which acts to [[decelerate]] [[object]]s that are moving through [[water]]. ===About Water Resistance===: '''Water resistance''' is a [[force]] so it is [[Measure|measured]] in [[Newton]]s.: '''Water resistance''' is a [[Contact Force|contact force]] because it can only exist when an [[object]] is moving in the [[water]].: '''Water resistance''' increases with [[speed]]. The faster you travel the greater the '''water resistance'''.: '''Water resistance''' depends on the [[Surface Area|surface area]] facing the direction of motion. The bigger the [[Surface Area|surface area]], the larger the '''water resistance''' ===Examples==={| class="wikitable"|-|[[File:WaterResistanceBoat.png|center|250px]]|[[File:WaterResistanceSubmarine.png|center|300px]]|-| style="height:20px; width:300px; text-align:center;" |As the boat moves through the [[water]] the '''water resistance''' slows things it down .| style="height:20px; width:300px; text-align:center;" |The [[thrust]] of the submarine must provide a constant [[force]] to stay at the same speed because the '''water resistance''' would cause it to slow down.|} ==Key Stage 4=====Meaning===[[Water Resistance]] is a [[force]] which acts to [[decelerate]] [[object]]s that are moving through the [[water]]. ===About Water Resistance===: '''Water resistance''' is a [[force]] so it is [[Measure|measured]] in [[Newton]]s.: '''Water resistance''' is a [[Contact Force|contact force]] because it can only exist when they are an [[object]] is moving in the [[water]].: '''Water resistance''' increases with [[speed]]. The faster you travel the greater the '''water resistance'''.: '''Water resistance''' depends on the [[Surface Area|surface area]] facing the direction of motion. The bigger the [[Surface Area|surface area]], the larger the '''water resistance''': '''Water resistance''' exists because [[object]]s moving through [[water]][[collide]] with the [[water]] [[molecule]]s passing on some of its [[momentum]] which causes the [[object]] to lose [[momentum]] and therefore slow down. ===Examples==={| class="wikitable"|-|[[File:WaterResistanceBoat.png|center|250px]]|[[File:WaterResistanceSubmarine.png|center|300px]]|-| style="height:20px; width:300px; text-align:center;" |As the boat moves through the [[water]] the '''water resistance''' slows it down.| style="height:20px; width:300px; text-align:center;" |The [[thrust]] of the submarine must provide a constant [[force]] to stay at the same speed because the '''water resistance''' would cause it to slow down.|}