The six kinds of simple machines Select a lesson
what are the human senses

Define a simple machine
types of machines
explain an inclined plane for children Explain a wedge simple machine
Explain a screw simple machine Explain a lever simple machine
Explain the wheel and axle simple machine What is a pulley simple machine
Terminology on simple machines



RECOMMENDED LESSONS:

Asexual Reproduction
Clouds
Charact' of Living Things
Ecosystems
Elements, mixtures, comp.
Electricity

Energy
Forces
Genetics

Needs of Living Things
Nutrients in Food
Photosynthesis
Rock Cycle
Soils
States of Matter
The Five Senses
Water Cycle
Winds
The Lever simple machine


Important terms

Lever
A solid bar that rotates around a pivot and makes it easier to lift a load, move a heavy object or apply a force.

Force
A push or a pull. The unit of Force is called the Newton. Force (F) = Mass x Acceleration.

Work
The movement of an object resulting from a force applied to it. Movement is usually in the direction of the force. To calculate Work done, multiply Force (F) by Distance (D).  W=FxD

Input Force
The effort or force you put into a machine.

Output Force
The force the machine produces as a result of the input force.

Power
Power is the rate at which Work is done. Power is measured in Watt. Power = Work / Time

Mechanical Advantage (MA)
Simple machines do not work on their own. Someone has to apply input force to make it do work. MA is the ratio between the input force and the output force. A Mechanical Advantage is produced when a simple machine amplifies a small input force to produce a greater output force.

Rotation Point
The axis or center that a wheel or disc spins.

previous page

pulley  simple machines