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Gear
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===About Gears===
: The multiplying effect of [[gear]]s can be found by the [[ratio]] of the [[radius|radii]] or the number of 'teeth'.
: A [[gear]] with few teeth turning a [[gear]] with many teeth acts to decrease the [[speed]] and increase the [[moment]].
: A [[gear]] with many teeth turning a [[gear]] few teeth acts to increase the [[speed]] and decrease the [[moment]].
===Example Calculations===
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |A [[gear]] with [[radius]] 50mm is turned with a [[moment]] of 10Nm. This [[gear]] used to turn a second [[gear]] with a [[radius]] of 20mm. Calculate the [[moment]] of the second [[gear]].
| style="height:20px; width:200px; text-align:center;" |A [[gear]] with 45 teeth is turned with a [[moment]] of 25Nm. This [[gear]] used to turn a second [[gear]] with a 63 teeth. Calculate the [[moment]] of the second [[gear]].
| style="height:20px; width:200px; text-align:center;" |A [[gear]] with 144 teeth is turned with a [[moment]] of 72Nm. This [[gear]] used to turn a second [[gear]] with 60 teeth. Calculate the [[moment]] of the second [[gear]].