Wheels and Levers Study Notes
Thesixsimplemachinesare:
Screw
inclinedplane
Wedge
lever
WheelandAxle pulley
Frictioniscreatedwhen2objectsruborslidetogether.
Morefriction=moreeffort,hardertomove!
Lessfriction=easiertomove!!
AnotherwordforFORCEiseffortorwork
Somethingthatisheavyissaidtohavealotofweight
The3partsofaleverare:
Fulcrum–pivotpoint
Load–theobjectbeinglifted
Effort–theforce,wheretheworkisbeingdone
Thereare3classesoflevers.
Inaclassoneleverthefulcrumisinthemiddle.
Inaclasstwolever,theloadisinthemiddle.
Inaclassthreelever,theeffortisinthemiddle.
Givetworealworldexamplesforeachofoursimplemachines:
Lever:
WheelandAxle:
-hockeystick
-wheelbarrow
-scissor -caraxle
-prybar -steamroller
-teetertotter
-rollingpin
Wedge:
Pulley:
-axehead -crane
-knife
-clothesline
-woodnail -flagpole
-sewingneedle -boatwinch
InclinedPlane: Screw:
-loadingramp -auger
-staircase -woodscrew
-skateboardhalfpipe -lightbulb
-switchbacktrailupthemountain -car/rvjack