Simple Machines
Six simple machinesWW SLIP
Wedge, Wheel & axle,
Screw, Lever,
Inclined Plane, Pulley
Created by Campesi, SMS
Inclined Plane
•Inclined Plane-has
straight slanted
surface -exchanges
distance for effort
force.
Wedge
•Wedge-a double
inclined plane that
moves. Less effort
but greater
distance.
Levers
•Levers-a simple
machine consisting of
a bar that rotates at a
fixed point. The fixed
point is the fulcrum.
Three types of levers
•There are three
types of levers,
depending on where
the fulcrum is
located.
First Class Lever
•First Class leverfulcrum is in the
middle. Example:
scissors.
Second Class Lever
•Second class leverresistance (load or
output) in the middle.
Example:
Wheelbarrow
Third Class Lever
•Third class levereffort (input) in the
middle. Example:
fishing pole, ice
tongs.
Pulleys
•A pulley is a grooved
wheel that holds a
rope or a cable.
•Changes the
direction of your
effort force.
Screw
•Screw-an inclined
plane wrapped in a
spiral. Reduces
effort force but
increases distance.
Wheel and Axle
•Two circular objects
of different sizes.
Compound Machine
•Compound
machine-two or
more simple
machines.