Egypt

How did the Egypttions carry blocks that where 1000 times there weight to build pyramids?
using 1.3 millon stone blocks.some of the blocks were 15 tons.

On our camp there were 2 pulleys one on the flying kiwi,one for the highropes.-

Double-hung windows with Pulley Systems in pre 1914 house.

Double-hung Window with Pulley Systems

What is a Pulley? And who invented it?

A Pulley is a simple machine used to move a heavy load.

Archimedes first invented it in ancient Greek times.

Advantages to Double-hung windows with Pulley Systems.

•  The window opens wide to let in lots of fresh air.
•  It opens vertically so no one walking past will have to worry about whacking their head on it. 
•  It stays open without the need for locks or clasps.

Disadvantages to Double-hung windows with Pulley Systems.

• They brake. i.e. ropes snap, wheels can get brittle and fall apart.
• The windows aren’t sealed so cold draughts can get in which is not good during the winter months.
• In todays age they are difficult and expensive to fix and maintain.
• The window frame has to be pulled apart to fix pulley wheels and attach ropes back onto the counter weights. So would possibly need new wood for the frame and paint when putting it back together.
• Repainting windows has to be done carefully if doing it without pulling the frame apart to make sure they don’t get painted shut.

New Zealand houses.

Double-hung windows were first put into the ‘Arts and Crafts’ cottage style of Characteristic houses in the functional tradition era of Architecture. These houses were designed by Mr F.E Greenish.

Our research has found that our house which has 40% Double-hung windows was built before 1914. (QV.co.nz) 

Pulley Systems - Maia Brausch

Pulley Systems


Pulley systems are used in the real world to lift large masses onto tall heights. I have seen the workers repairing the roof of a house and using the pulley system to lift their tools and materials to the roof.

The pulley system is made up of of one or more pulleys and a rope or a cable. The number of pulleys used may be more or less, so the easier it is to lift the object that is being lifted.

No matter how easy it is to use the pulley system, the system itself is not very easy to use because of the force of friction. For example, one has to pull two meters of rope of cable through the pulleys just to lift an object one metre.



Ancient Egyptian Pulley System

The ancient Egyptian wooden four lobe pinion pulley was used to construct the Giza Pyramids in around 2600 BC.

This pulley surrounds its load and works with a mechanical advantage of 2.8 (MA=2.8) on the lever principle. When hoisted, the pulley with load rotates and climbs stepped structures with engagements of pulley lobes with steps.

This is earliest machine known using "rack and pinion" mechanical technology.



Ezekiel's vision

Ezekiel’s vision is about some ideas about alien spacecraft and the planets motion of our solar system.

What great structures have been put up in the Middle East where thousands of workers were employed and who would return home and tell others what they saw?

Ezekiel’s writings started in Babylon around 590 BC and his descriptions are very specific in many instances. The “wheel within wheel” machines are “high and awesome having four rims with eyes all around.”

Ramps are not mentioned in any documents describing how the Giza Pyramid were made, so why ramp theories exist today is a bigger mystery than the Pyramid itself.



By Maia Brausch (with the help of Google)

Team New Zealand - Pulleys

Team New Zealand

On a sailing boat pulleys are used with the sails.

 

The ropes go through pulleys and keep the sails tight. 

 

The wind then blows against the sails to make the boat go fast.

 

The pulleys make it easier to pull the ropes tight.

 

 

Go Team New Zealand

By Daniel Taylor

 

Egyptain Pulleys

Did you know that a pulley is used nearly every second!

The pulley is a wheel with two raised edges for the rope to fit through, you can use it in different ways, lifting heavy loads, transmit power and also apply forces!

The Ancient Egyptians used the pulley to make pyramids that normal people could carry, the stone blocks were over 10 tons (that's a lot)!

By Jeffrey Lin

Egyptians by Alice

My pulley story is about one of the tools the Egyptians used to build the Pyramids.

It is called the Four Lobe Pinion Pulley. 

It was used for getting heavy stone blocks up to the top of the pyramids.

The four lobes are the cradles, these were tied to the sides of the heavy stone blocks.

This turned the stone block into a small gear.

The big gear was the steps on the pyramid.  

 

They then got really strong rope and some really strong men they put it over their shoulder and they pulled the pulley up to the top of the pyramid.

The steps on the pyramid lined up with the lobes on the block to stop it from wobbling and falling off. A bit like gears.

The other way of doing it was to turn the block into a cylinder.

When you turned the block into a cylinder you needed a ramp instead of steps.

  

My pulley is the same as the one invented by Archimedes except it does not have a fixed pulley. The cylinder is the pulley and the man is the energy to move it, the point at the top is the fixed point. Because half of the weigh of the block is on each rope the weigh on the rope is halved.

By Alice

 

Pulleys

A pulley is a kind of wheel with two raised edges that a rope runs along. You can use pulleys in different way, to make it easier to pull a rope, to change the direction of the force, or to get more mechanical advantage and lift something heavier than you could usually lift by yourself.

 

This clothesline uses a fixed pulley.

A fixed pulley is attached to a hook or a wall and doesn't move. It doesn't change the force needed to lift something but can change the direction of the force, that is you can pull down to lift something up.
A moveable pulley gives you a mechanical advantage. This means you can pull with less force for longer distance to get the same work done. This means you can lift things that would usually be too heavy to lift without a pulley.

By Emily

Archimedes (pulleys)

We use pulleys almost everyday!

Archimedes was a great mathematician and engineer who was born 287 years BC in Syracuse, Sicily. He is credited with coming up with the idea and the use of modern day maths equations and the way things like levers pumps and pulleys work. Archimedes had wrote in a letter to King Hieron that he could move any weight with pulley, he boasted that given enough pulleys he could move the whole world! The king challenged him to move a big ship that would take lots of men and a great amount of work to move the sea. On the planned day, the ship was loaded with lots of passengers and lots of cargo, and the king watched to see if Archimedes could do what he said he could do. Archimedes knew he could improve his mechanical advantage for lifting or moving objects using pulleys.
A pulley moves a force along a rope without changing how big it is. When engineers work with pulleys they often make sure that the rope of the pulley moves smooth and evenly, without catching. These systems are known simply as "pulley systems" because they use the same rope through the whole system, if the pulleys were attached with more than one rope the system would be a "complex system".

By Katie

Roman water wells

The people of Ancient Rome used pulleys to pull water from deep under the ground.
Evey body needs water to survive.
To use this pulley they would have turned a handle which made the rope pull the bucket up.
They then empty the bucket before lowering again. This is a very simple and old system that works very well. It would have looked like this.

By Renee  Booth

Chinese Horse Pulley

The Chinese horse pulley was created in 300 BC. The Chinese thought it was quite handy seeing as how the rope would hurt the horses neck.

The better collar allows the horse to carry 1 and a half tons without hurting it. It was also easier to lead the horse around. The new collar supports the horses neck and shoulders making it easier for the horse to carry heavy objects.

Did you know we use a pulley nearly everyday !I think not only were the Chinese smart but they also cared about their animals.

BY CHLOE



how the Egyptians used pulelys

The Egyptians made Pyramids with blocks that was heaver than two tons!(4000 pounds). but they could not lift the blocks up so they invented a pulley. It was made to lift and pull blocks from limestone cliffs to the sites of the Pyramids. we still use pulleys. they are around us. by Tainn Simpson

Karearea Kids

Karearea Kids

AVAs homework

Archimedes was born in the city of Syracuse on the island of Sicily in 287 BC. He was the son of an astronomer and mathematician named Phidias. Aside from that very little is known about the early life of Archimedes or his family. Some maintain that belonged to the nobility of Syracuse, and that family was in some way related to that of Hiero II, king of Syracuse.                  



The meaning of some words

An astronomer is someone who specialises in astronomy

Astronomy is a study of matter in outer space

A mathematician is a person who is skilled or learned in mathematics

BY AVA

Easter holiday

There I was, listening to the  footsteps of Easter Bunny climbing up the stairs, THUMP THUMP he kept getting closer until THUMP! I heard my Easter egg being placed on the couch and then as quick as a flash he was gone, probably in the other room but still gone.I woke up the next morning tired but not completely tired because I really wanted find all the eggs. First we looked behind the TV then we searched under the pillows then we explored outside.
There were hundreds of Easter eggs but I suppose there were seven kids and most of them loved Easter eggs so that's why there were lots of eggs. And that was the end of the Easter egg hunt.

By Will

Pulleys used in Trebuchets

Did you know that the pulley was also used in the trebuchet?

The Trebuchet was a giant sometimes moveable catapult that the pulley was used in.
The pulley was used to make heavy objects lighter than lifting them with your hands.
The pulley was used to lift and fire whatever they wanted to throw.

Hope you enjoyed reading this.
By Will.

Greek Pulleys

The Ancient Greeks invented a lot of things, take the crane for instance,
there were  lots of great inventors but "Archimedes" was one of the best.....

Did you know that we use a pulley nearly everyday?
Like the curtains for example.
The string is like the pulley and we use that to open and close it!
The greeks also had a good use of the crane, they used the pulley to build the Parthenon (a temple dedicated to the godess Athena).
The crane can be powered  by people but also animals such as donkeys and horses.A greek man named Archimedes first came up with the idea, he also made the claw, which was used to defend the city of Syracuse by sinking the ships of the coast. Archimedes once tried the impossible task of counting every sand grain in the universe.
Scientists assume that the pulley was first invented in 900 BC though there is no direct proof.

Greek
pulleyArchimedes

By Mia  Perkins Room 3

Flying kiwi

I remember getting hauled up to the top of the flying kiwi and being lowering back down like a tired bird to the ground. I could hear my friend cheering me.They were like parrots saying my name over and over again. I felt like I was going to faint.
The sound of the falls was like someone whispering to me in a dream.

By Alice.  

Easter

Easter is amazing and cool. This Easter was the best Easter ever. On Easter morning I got chocolate eggs. I went on an egg hunt. there was hundreds of children screaming and shouting.I found a lot of eggs. When I got home I grabbed a chocolate egg and started to pull the bits off it. I ate it like a greedy pig. I think that Easter is cool.  by Tainn Simpson 

Sweet Weekend

Easter Easter Easter! One of my favourite times of the year! The smell of yummy hot cross buns tickle my nose as I take a big bite. The fresh morning air freezes my hands as I hunt for Easter eggs like I'm looking for treasure. My advice to you is hide your Easter eggs from your little brothers or sisters or they will polish them off before you can say 'Easter Bunny!'

by Chloe

Easter

I woke up to the wafting smell of chocolate drifting through the early morning air.
As I looked about wearily I saw a plastic bag, and shining golden wrappers.
Excitedly I jumped out of bed and ran to my dressing table, I noticed the bag was tied up tight, so I ripped it open and gobbled up an Easter egg.
The delicious chocolate ran down my throat like a wonderful stream of fresh water.

I couldn't wait for the next egg to reach my mouth!

By Katie

Wonderful Easter

Easter is wonderful I've never seen so much chocolate before.
Everything is chocolate! I'm surprised no one's away sick.
There's never been so much sugar before Easter Bunny's,chocolate eggs and
special Easter dinners really get me full!


By Blake Cooper

Summer

The sun heats the sand like fire .
The waves are as high as a house.
The sand burns my feet like the sun is on the ground.
Mosquios biting me on my feet like crabs clicking their claws.

By Sophie

Summer Days

The Summer reaches into every nook and cranny,
It heats the grass and burns ground.Like a gust of wind it sweeps across the day.Summer days last forever,
School's out and Christmas is creeping closer every second.
The water on our togs and bodies glisten like rainbows fragile like glass sparkling brightly.
Summer nights as hot as chile, call to mosquitoes as they patrol our tents like guards at Buckingham Palace.

From summer swims, to campfires, to lazy days, to reading,to camping, to jumping with joy, to sleepovers, the days stretch out like a long snake slithering past the days.

By Mia

Trees

WOW! Huge giants standing up straight green gleaming leaves shimmering in the sun light.

Children thumping their feet in excitement so loudly it makes the ground shake.

Trees are as tall as a tower.

I love these beautiful beasts.

By Caitlin