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Sir Isaac Newton (25 December 1642 – 20 March 1727) was an English physicist, mathematician, astronomer, natural
philosopher, and alchamist, has been "considered by many to be the greatest and most influential scientist who ever lived." Isaac Newton was born on 25th December 1642 at Woolsthorpe
Manor in Woolsthorpe-‐by-‐Colsterworth, a hamlet in the county of Lincolnshire .Newton was born three months after the death of his father, a farmer also named Isaac Newton. When Newton was three, his mother remarried and went to live with her new husband, the Reverend Barnabus Smith, While Newton was once engaged in his late teens to a Miss Storey, he never married, being highly engrossed in his studies and work.
What is a force? In everyday speech we use the word ‘force’ as with many scientific words, rather vaguely. It suggests an effort-‐ the words ‘energy’ and ‘work’ are used almost interchangeably with it. The scientific meaning of the word is more formal-‐ Newton defined the concept of the force with his three laws of motion, and the unit of force is named after him, the Newton:
First law: An object continues moving at the same velocity unless acted on by a force Second law; When a body is acted on by a force, it experiences an acceleration which is proportional to the force and inversely proportional to the mass of the body Simply: Force on body = mass x acceleration Third law: If a body is experiencing a force from some other object, then it exerts an equal and opposite force on that object
Natural Structures Here are some of the world’s most stunning natural structures:
Green Bridge of Wales, in which erosion has created the shape of its arch
Antarctica, the world’s largest desert (is considered to be a desert, despite being made of ice)
The landscape arch, located in Utah (USA) is the world’s longest arch
Yarlung Zangbo Grand Canyon, in China, is the world’s largest, and deepest canyon in the world.
Man Made Structures
Here are some of the world’s most stunning man made structures.
The Eiffel Tower, in Paris, takes about 10,000 light bulbs to light up at night.
The Great Pyramid Of Giza, in Egypt, was made by the ancient Egyptians, and each weighs about 2 tonnes
The Great Wall Of China, which stretches a phenomenal 3946 miles across China, is one of the most amazing mad-‐made structures in the world
Mount Rushmore, in South Dakota (USA), show the faces of 4 former American presidents carved into the rock.
Structural Forces
Here is some useful information on Structural Forces
This is a computer desk. In a structure, there are forces acting on it, helping it to stand itself up. There are two main forces acting on a structure; tension, and compression This part of the computer desk is in tension. It is in tension because the weight of the computer is stretching the part of the desk. This part of the computer desk, however, is in compression. It is in compression because the weight of the computer, and the parts of the desk the is above this point, is pushing downwards, therefore compressing it. These are the same forces as above, but on the inside compression is taking place (being pushed downwards) and on the outside tension is taking place (being strectched)