Problem

You arecampingwithyourfamilyandyourbestfriend.Nowyouwanttositbyacampfire.Andit’syourturntohelpstart it!


Youandyourfriendgatherlogs.Youmakeapile.Youraunttriestolightthemwithamatch.Nothinghappens.Shesmiles.“Weneedsmaller pieces.


Buthow?Thewoodistoohardtobreakwithyourhands.“Weneedatool,yourfriend says.

Solution

Yourememberseeingasmallaxeinaboxofcampinggear.It’stheperfecttoolforthe job!


Youbringittoyouraunt.Shestandsalogonend.Sheswingstheaxe.Thebladestrikesthe wood.


THWACK!Thelogsplitshalfway.Anotherswing.CRACK!Itsplitsintwo.Soon thelogisinpieces.Thepiecesaresmallenoughtostartafire.Problem solved!

WithapowerfulCHOP,this axeheadsplitsthewood.Theaxeheadisa wedge.

It'sSimple

Theaxeisagoodtooltosplitwood.It’sasimplemachine.Simplemachineshelpusdojobs.Theymovethingsfaster,farther,ormoreeasilythanwecanwithout them.


Youprobablydon’tthinkofanaxeasamachine.Ablenderoracarmightcometomind.Thesemachineshavelotsof parts.

Simplemachineshavejustafewparts.Somehaveonlyonepart.Nearlyeverymachine,however,ismadeupofoneormoresimplemachines.Theaxethatyouusedtosplitthewoodisasimplemachinecalledawedge.It’sshapedlikeatriangle.Howdoesit work?


Itstartswitheffortfromyou.Youswingtheaxe.That’stheforcebehinddrivingtheaxebladeintothe wood.Thewedgeshapeoftheaxepushesthewoodsideways.CRACK!The sideways forcesplitsthe wood.

force direction