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Simple Machines
Inclinedplane
Wheel and axle
wedge
screw
pulley
lever
Types Of Simple Machines
Machines
Machines make work easier.
Machines allow you to use less force to do work.
work and energy video 13:00 min
Levers A lever is a long bar with a support. The fulcrum supports the weight of
the bar and what the bar carries. The object you want to move is called
the load. The effort is a push or pull that
moves the load in some way.
Welcome to Discovery Education Player
(3:23 minutes)
Wheel and Axle
A special kind of lever that moves or turns objects
wheel and axle video 1:36min
Pulley
A pulley is a wheel and axle with a a rope, wire or chain around it.
A pulley changes the direction of force—you pull down on the rope to make the load go up
pulley video 2:53min
Inclined Plane An inclined plane
is the same as a ramp.
Objects can be slid up or down an inclined plane to make the job easier.
inclined plane video 1:28 min
Wedge A special kind of
Inclined Plane Wedges are used
to split things apart
They can also be used to hold things together.
Wedge Video 1:43 min
Screw A screw is also an
inclined plane. If you could unwrap a screw’s threads you could see the inclined place.
Screws fasten things together.
screw video 1:44 min
Complex Machines
Complex Machines are Simple Machines working together.
The handles are levers
The sharp edge is a wedge
Winding the handle is turning a wheel and axle inside
Review video on all simple machines 14:36 min
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