What is a Simple Machine?

What is a Simple Machine? A simple machine

has few or no moving parts.

Simple machines make work easier

Simple Machines Simple Machines

can be put together in different ways to make complex machinery

Inclined Planes An inclined plane is

a flat surface that is higher on one end

Inclined planes make the work of moving things easier

Example of Inclined planes

Wheels and Axles The wheel and axle

are a simple machine

The axle is a rod that goes through the wheel which allows the wheel to turn

Gears are a form of wheels and axles

Example of Wheel and axle

Pulleys Pulley are wheels

and axles with a groove around the outside

A pulley needs a rope, chain or belt around the groove to make it do work

Example of pulley

Wedges Two inclined

planes joined back to back.

Wedges are used to split things.

Example of wedge

Screws A screw is an

inclined plane wrapped around a shaft or cylinder.

The inclined plane allows the screw to move itself when rotated.

Example of Screw

Levers-First Class In a first class lever

the fulcrum is in the middle and the load and effort is on either side

Think of a see-saw

Example of 1st class lever

Levers-Second Class In a second class

lever the fulcrum is at the end, with the load in the middle

Think of a wheelbarrow

Example of 2nd class lever

Levers-Third Class In a third class lever

the fulcrum is again at the end, but the effort is in the middle

Think of a pair of tweezers

Example of 3rd class lever

Rube Goldberg Cartoonist not

inventor. Used simple

machines in his comics to accomplish simple tasks.

Your Task

To create a Rube Goldberg design with the ending result being to accomplish something minimal (like cracking an egg) with a complex (hard) effort.

Guidelines

At least 3 simple machines involved (use notes taken

today)Only the first action can be a

“human action”Must have at least five actions.

Examples of Tasks

Crack an eggPop a balloon

Feed a petBring in a newspaper

Types of Materials you can use

DominosTubingRuler

MarblesFunnel

Wind up carPulleys

Don’t Go And Buy Anything

Your GradeSimple Machine Notes/Planning sheet Rube Goldberg Blueprint – drawn w/

ruler, labeled Rube Goldberg modelDid your Rube Goldberg complete the

task? Extra credit given.

Today’s TaskBegin brainstorming a simple task for

your machine to complete. Decide which simple machines you are

going to use. (Need at least 3)Decide what materials you need and

who will bring them. We begin building tomorrow. Don’t buy anything.

Final Design of Rube Goldberg

Draw and label below

Task_________

List the 2 types of simple machines used in your Rube Goldberg

How many actions are in your Rube Goldberg

Rube Goldberg Rubric

Simple machine notes(5)

Blueprint (15)

Rube Goldberg(80)

Did Rube G. complete the task(extra credit) (10)

RememberNotes and Planning sheet due today.You are able to work by yourself or with

others of your choice.Groups must be on task and productive

at all times. A warning will be given to any group

note adhering to the above guidelines.Once a group has a total of TWO

warnings, the group will be dissolved.