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Name: _____________________ Class: _________ Date:__________
Notes on Simple Machines
Name of
Simple
Machine
1st class
lever
2nd class
lever
Diagram with input (effort) and output
(resistance or load) forces labeled
How does it make
work easier?
(changes force or
distance?)
How is the mechanical
advantage of the
simple machine
calculated (formula &
description)?
3 everyday
examples of the
simple machine
Name of
Simple
Machine
Inclined
plane
Fixed
Pulley
Diagram with input (effort) and output
(resistance or load) forces labeled
How does it make
work easier, but
not alter the
amount of work
done on an
object?
How is the mechanical
advantage of the
simple machine
calculated (formula &
description)?
3 everyday
examples of the
simple machine
Name of
Simple
Machine
Movable
Pulley
Block and
Tackle
Pulley
Diagram with input (effort) and output
(resistance or load) forces labeled
How does it make
work easier, but
not alter the
amount of work
done on an
object?
How is the mechanical
advantage of the
simple machine
calculated (formula
&/or description)?
3 everyday
examples of the
simple machine
Name of
Simple
Machine
Diagram
Wheel and
axle
How does it make
work easier?
Lifts or moves
loads, increases
distance,
decreases force
How is the mechanical
advantage of the
simple machine
calculated (formula &
description)?
MA = radius of wheel
radius of axle
3 everyday
examples of the
simple machine
Car, wagon,
doorknob, pencil
sharpener, bike
A wheel with a rod,
called an axle, through its center: both parts
move together
Screw
Holds things
together or lifts,
increases distance,
decreases force
The longer the spiral
and the closer together,
the more MA
An inclined plane
wrapped around a pole
Wedge
Cuts or spreads an
object apart –
increases distance,
decreases force
An object with at least
one slanting side ending in a sharp edge
Screw, jar lid,
vise, bolt, drill,
corkscrew
MA = length of wedge
Width of thickest
part of wedge
The longer & thinner,
the more MA
Knife, pin, nail,
chisel, ax,
snowplow, front
of a boat