Here are a few cartoons I did for an educational web site: Planet Science along with a testimonial from the editor!

Levers
So what’s the big deal about levers? Well, they are simple machines that help make your life easier. Have a look at this….

Archimedes (Greek mathematician, 287 to 212 B.C.) said, “Give me a place to stand and I will move the Earth,” meaning that if he had a lever long enough, he could move the Earth by his own effort.  At the very least we can show that a child can lift an adult:

Archimedes lifting the Earth!

You will need:
* An adult
* A child
* A brick or block of wood
* A plank of wood 1 inch thick and at least 4 feet long

What to do:
1. Make a lever by placing the plank over the wood block.
2. To take advantage of the properties of the lever, make sure the fulcrum (wood block) is closer to the end of the lever on which the adult will stand.
3. Have the adult stand on the short end and the child stand on the long end. What happens?
4. If the child cannot lift the adult, adjust the fulcrum so that it is closer to the side on which the adult is standing.

“We’ve used Richard a lot for various features on http://www.planet-science.com
His cartoons and illustrations are winners for us, I think because at
heart he’s a very talented artist and can draw anything well. He has a
great knack of being able to quickly absorb what it is you’re aiming at
and adding loads of wit, cuteness and clever ideas to your project,
whilst listening and using any feedback you have for him too. He has
always met (some pretty tight!) deadlines and is great at sticking to
your budget if you have a limit. Thanks Richard!”

http://www.planet-science.com/sciteach/index.html?page=/experiment/

Katie Walsh, Editor, www.planet-science.com

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