1. By Lúa, Sara and Zacarías.

2. Inclined plane
An inclined plane
is a straight ramp
that is cut into a
hillside and used for
moving loads up
and down the hill.
Often the inclined
plane was provided
with cars riding on
rails and pulled up
and lowered down
using a cable

3. PULLEY
A pulley is a wheel on an axle that is
designed to support movement of a
cable or belt along its
circumference.[1] Pulleys are used in
a variety of ways to lift loads, apply
forces, and to transmit power.

4. WEDGEPerhaps the first example of
a wedge is the hand axe, . A
wedge is a simple machine
that transforms lateral force
and movement of the tool
into a transverse splitting
force and movement of the
workpiece The available
power is limited by the effort
of the person using the tool,
but because power is the
product of force and
movement, the wedge
amplifies the force by
reducing the movement

5. WHEEL AND AXLE
The simple machine called a wheel
and axle refers to the assembly
formed by two disks, or cylinders, of
different diameters mounted so they
rotate together around the same
axis. Forces applied to the edges of
the two disks, or cylinders, provide
mechanical advantage. When used
as the wheel of a cart the smaller
cylinder is the axle of the wheel, but
when used in a windlass, winch, and
other similar applications (see
medieval mining lift to left) the
smaller cylinder may be separate
from the axle mounted in the
bearings.[7]

6. SCREW
A screw is a mechanism that
converts rotational motion to
linear motion, and a torque
(rotational force) to a linear
force.[1] It is one of the six
classical simple machines.
The most common form
consists of a cylindrical shaft
with helical grooves or ridges
called threads around the
outside

8. BIBLIOGRAPHY
•http://en.wikipedia.org/wiki/Inclined_plane
•http://en.wikipedia.org/wiki/Pulley
•http://en.wikipedia.org/wiki/Wedge_(mechanical_device)
•http://en.wikipedia.org/wiki/Wheel_and_axle
•http://en.wikipedia.org/wiki/Screw_(simple_machine)
PICTURES
•http://www.irc.vbschools.com/fortheweb/Science/images/SimpleMachines.jpg
• http://upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Plan_inclin%C3%A9_machine_stationnaire_Liverpool
_Minard.jpg/400px-Plan_inclin%C3%A9_machine_stationnaire_Liverpool_Minard.jpg
•http://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Crane_pulley_4x.jpg/220px-Crane_pulley_4x.jpg
•http://upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Wedge-diagram.svg/100px-Wedge-diagram.svg.png
•http://upload.wikimedia.org/wikipedia/en/thumb/0/0d/Agricola1.jpg/220px-Agricola1.jpg
•http://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/GearBoxRotLinScrew.gif/220px-
GearBoxRotLinScrew.gif
•http://teachers.scholarschoice.ca/images/products/25/Simple-Machines-Learning-Chart-N2575_XL.jpg