All terms in this list:

Machine: Any device that helps people do work

Mechanical Advantage: The number of times a machine multiplies the input force

Efficiency: The ratio of its output work to the input work

Simple Machines: The six machines on which all other mechanical machines are based

Lever: A solid bar that rotates, or turns, around a fixed point

Fulcrum: A fixed point

Wheel and Axle: A simple machine made of a wheel attached to a shaft, or axle

Pulley: A wheel with a grooved rim and a rope or cable that rides in the groove

Inclined Plane: A simple machine that is a sloping surface

Wedge: A simple machine that has a thick end and a thin end

Screw: An inclined plane wrapped around a cylinder or cone to form a spirall

Compound Machine: A machine that is made of two or mare simple machines

Nanotechnology: The science and technology of building electronic circuits and devices from single atoms and molecules

Robot: A machine that works automatically or by remote control

Output Force: The amount of force or energy the simple machine transfers to another object to preform work

Input Force: The amount of force applied to a simple machine to preform work

Output Work: The energy or amount of work a simple machine produces and transfers to another object

Input Work: The energy or amount if work you do on an simple machine