6 Simple Machines
https://en.wikipedia.org/wiki/Simple_machine
http://www.livescience.com/49106-simple-machines.html
LEVER:
INCLINED PLANE:
PULLEY:
WHEEL AND AXLE:
SCREW:
WEDGE:
https://en.wikipedia.org/wiki/Simple_machine
http://www.livescience.com/49106-simple-machines.html
LEVER:
INCLINED PLANE:
PULLEY:
WHEEL AND AXLE:
SCREW:
WEDGE: