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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 - PowerPoint PPT Presentation
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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.