I have learnt how to do my own work on Google draw. The progect that I am doing is about me.

Wheels and cogs

Cogs:                                                        

The wheel is perhaps man’s greatest invention. Simple as it seems, it is the very basis of movement. The cart, the cycle, the motor-car and the railway train move on wheels. Even aircraft which fly thousands of kilometres through the air need wheels for taking-off and landing. It is not only for transport that the wheel is vital. Machines that produce various goods for us, watches that tell us the time, generators that produce electricity, and many gadgets which have become essential in our day-to-day life cannot work without a wheel.

wheels allow you to do something easy for a longer time, instead of doing something hard for a shorter time. If you turn a large wheel fixed to an axle, the axle will also turn. You can turn the large wheel easily (but it takes a lot of turning to go all the way around). The axle will go around a much shorter distance, but with more force. So you can use a wheel to create a mechanical advantage - you can turn something heavy, by spinning a large wheel attached to an axle that is attached to the heavy thing. That's how a pencil sharpener works. Or, you can do it the other way around - use a lot of force to turn the axle, and that will spin the wheels really fast. That's what cars do when they have wheels.

The wheel is probably the most important mechanical invention of all time. Nearly every machine built since the beginning of the Industrial Revolution involves a single, basic principle embodied in one of mankind’s truly significant inventions. It’s hard to imagine any mechanized system that would be possible without the wheel or the idea of a symmetrical component moving in a circular motion on an axis. From tiny watch gears to automobiles, jet engines and computer disk drives, the principle is the same.

Based on diagrams on ancient clay tablets, the earliest known use of this essential invention was a potter’s wheel that was used at Ur in Mesopotamia (part of modern day Iraq} as early as 3500 BC. The first use of the wheel for transportation was probably on Mesopotamian chariots in 3200 BC. It is interesting to note that wheels may have had industrial or manufacturing applications before they were used on vehicles.

A wheel with spokes first appeared on Egyptian chariots around 2000 BC, and wheels seem to have developed in Europe by 1400 BC without any influence from the Middle East. Because the idea of the wheel appears so simple, it’s easy to assume that the wheel would have simply "happened" in every culture when it reached a particular level of sophistication. However, this is not the case. The great Inca, Aztec and Maya civilizations reached an extremely high level of development, yet they never used the wheel. In fact, there is no evidence that the use of the wheel existed among native people anywhere in the Western Hemisphere until well after contact with Europeans.

Poster of the smart kid Etai.

I learnt how to use Google Draw to make a poster about myself. I remembered the cybersmart rules as I was going to publish this in my blog.

Tongan

My Friends are Kaufana, Pareata, Timothy Moko and Tamim.

Etai

I like pies, baked beans, Spaghetti and burger.

How levers work.

In school we are learning

About cogs,levers and ramps.

There are three choices there is cogs,levers and ramps.

A lever is like a machine that does all the hard work. It is used in different ways. The lever can make kids go up and down.The levers can do all the hard work. When you are on the levers it makes you go up and down when the fulcrum is in the middle of the lever. The lever is something that can go up and down but it can’t go left and right. The fulcrum of the lever is the main one to keep it going.