Table of friction coefficients: Difference between revisions

Revision as of 21:59, 20 January 2010

First surface	Second surface	Condition	$\mu _{s}$	$\mu _{k}$	$\tan ^{-1}(\mu _{s})$ (radians)	$\tan ^{-1}\mu _{s})$ (degrees)	$\tan ^{-1}(\mu _{k})$ (radians)	$\tan ^{-1}(\mu _{k})$ (degrees)
Aluminimum	Steel	Dry and clean	$0.61$	$0.47$	$0.55$	$31$	$0.44$	$25$ degrees
Aluminimum	Aluminimum	Dry and clean	$1.05-1.35$	$1.4$	$0.81-0.93$	$46-53$	$0.95$	$54$
Copper	Steel	Dry and clean	$0.53$	$0.36$	$0.49$	$28$	$0.35$	$20$ =
Copper	Copper	Dry and clean	$1.0$	?	$0.79$	$45$	?	?
Wood	Wood	Dry and clean	$0.25-0.5$	?	$0.24-0.46$	$14-26$
Wood	Wood	Wet	$0.2$	?	$0.2$	$11$	?	?

For more, see The Engineer's Handbook

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 <section begin="table"/>
 {| class="sortable" border="1"
-! First surface !! Second surface !! Condition !! <math>\mu_s</math> !! <math>\mu_k</math> !! <math>\tan^{-1}(\mu_s)</math> !! <math>\tan^{-1}(\mu_k)</math>
+! First surface !! Second surface !! Condition !! <math>\mu_s</math> !! <math>\mu_k</math> !! <math>\tan^{-1}(\mu_s)</math> (radians) !! <math>\tan^{-1}\mu_s)</math> (degrees) !! <math>\tan^{-1}(\mu_k)</math> (radians) !! <math>\tan^{-1}(\mu_k)</math> (degrees)
 |-
-| Aluminimum || Steel || Dry and clean || <math>0.61</math> || <math>0.47</math> || <math>0.55 \simeq 31</math> degrees || <math>0.44 \simeq 25</math> degrees
+| Aluminimum || Steel || Dry and clean || <math>0.61</math> || <math>0.47</math> || <math>0.55</math> || <math>31</math>|| <math>0.44</math> || <math>25</math> degrees
 |-
-| Aluminimum || Aluminimum || Dry and clean || <math>1.05 - 1.35</math> || <math>1.4</math> || <math>0.81 - 0.93 \simeq 46 - 53</math> degrees || <math>0.95 \simeq 54</math> degrees
+| Aluminimum || Aluminimum || Dry and clean || <math>1.05 - 1.35</math> || <math>1.4</math> || <math>0.81 - 0.93</math> || <math>46 - 53</math> || <math>0.95</math> || <math>54</math>
 |-
-| Copper || Steel || Dry and clean || <math>0.53</math> || <math>0.36</math> || <math>0.49 \simeq 28</math> degrees || <math>0.35 \simeq 20</math> degrees
+| Copper || Steel || Dry and clean || <math>0.53</math> || <math>0.36</math> || <math>0.49</math> || <math>28</math>|| <math>0.35</math> || <math>20</math> =
 |-
-| Copper || Copper || Dry and clean|| <math>1.0</math> || ? || <math>0.79 \simeq 45</math> degrees
+| Copper || Copper || Dry and clean|| <math>1.0</math> || ? || <math>0.79</math> || <math>45</math> || ? || ?
 |-
-| Wood || Wood || Dry and clean || <math>0.25 - 0.5</math> || ? || <math>0.24 \simeq 14</math> degrees || <math>0.46 \simeq 26</math> degrees
+| Wood || Wood || Dry and clean || <math>0.25 - 0.5</math> || ? || <math>0.24 - 0.46</math> || <math>14 - 26</math> ||
+|-
+| Wood || Wood || Wet || <math>0.2</math> || ? || <math>0.2</math> || <math>11</math> || ? || ?
 |}
 For more, see [http://www.engineershandbook.com/Tables/frictioncoefficients.htm The Engineer's Handbook]
 <section end="table"/>