GRAVITATION : WHAT YOU NEED TO KNOW?
written on 2017 dec by yedhukris
disclaimer : you can read what you need and you can avoid what you don't need! but for full experience we recommend you to read all
newton's law of gravitation
newtons early facts
Facts about Isaac Newton
He was born January 4, 1643, in Woolsthorpe, England, United Kingdom
He died March 31, 1727, in London, England, United Kingdom
Newton actually studied for a degree in law.
The young Isaac was enrolled in King’s School in Grantham, a town in Lincolnshire (Grantham was the birthplace of Mrs Thatcher)
Newton’s mother wanted Isaac to become a farmer, but Isaac had no interest in farming exams and failed!
He owned more books on historical subjects than on science.
Isaac Newton suffered two nervous breakdowns.
Newton was notorious for his bad temper and conflicts with other people. In particular Hooke and Leibinz.
Between 1665 and 1667 the University of Cambridge was dispersed due to the Plague and Newton returned to Woolsthorpe Manor.
Isaac Newton become known in the scientific community through his refractive telescope – a big improvement on existing telescopes.
Isaac Newton disliked to hear any criticism and he became embroiled in a bitter row with Robert Hooke, an original member of the Royal Academy.
After the death of his mother in 1678, Newton entered six years of intellectual seclusion where he only communicated with the briefest notes.
It is claimed Newton’s discovered the theory of gravity after watching an apple fall in the orchard.
Throughout his life Newton continued research into a wide range of subjects including mathematics, optics, astronomy and alchemy.
Newton was interested in the new wave of philosophy becoming known in the Western world. He became an acquaintance of the political philosopher John Locke.
He was elected as Member of Parliament for the University in 1700, but only held this post for a year.
Newton himself would tell the story of an apple falling from a tree giving him inspiration for his work on gravity. However, there is no evidence he was actually hit by an apple!
Newton’s book – Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), has been called the single most influential book on physics
In 1696, Newton was appointed warden of the Royal Mint. He took his duties very seriously, seeking to prevent corruption.
As master of the Mint, Newton moved the British currency, from the silver to the gold standard.
Newton was fascinated with religion, though didn’t hold orthodox views. He wrote an article on textual criticism of the Bible.
One of Newton’s most famous quotes was:
“If I have seen further it is by standing on the shoulders of giants.”
English poet Alexander Pope wrote the following epithet for Newton.
“Nature and nature’s laws lay hid in night;
God said “Let Newton be” and all was light.”
Newton died in 1727, at the age of 85
two masses when there center is separated by distance r then the gravitation force between them is
F=G*((m1*m2)/r^2)
Newton's law of universal gravitation states that a particle attracts every other power particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
also consider that the ratio of CGS and SI value of g is 10^-3
calculate the gravitational force b/w 2 electron saperated by 1m?
vector form of law of gravitation
***************************
vector have both magnitude and direction
fig
m1----r----m2
force from m1 to m2 will be f12
force from m2 to m1 will be f21
so they have obeyed the thirdlaw of newton...every action has and equal and opposite reaction
f=Gm1m2*(-r^)/r^2
f=-Gm1m2*(r-->)/r^3 (we just multiplied r/r to the first equation to make r^ to r--> vector)
disclaimer : you can read what you need and you can avoid what you don't need! but for full experience we recommend you to read all
newton's law of gravitation
newtons early facts
Facts about Isaac Newton
He was born January 4, 1643, in Woolsthorpe, England, United Kingdom
He died March 31, 1727, in London, England, United Kingdom
Newton actually studied for a degree in law.
The young Isaac was enrolled in King’s School in Grantham, a town in Lincolnshire (Grantham was the birthplace of Mrs Thatcher)
Newton’s mother wanted Isaac to become a farmer, but Isaac had no interest in farming exams and failed!
He owned more books on historical subjects than on science.
Isaac Newton suffered two nervous breakdowns.
Newton was notorious for his bad temper and conflicts with other people. In particular Hooke and Leibinz.
Between 1665 and 1667 the University of Cambridge was dispersed due to the Plague and Newton returned to Woolsthorpe Manor.
Isaac Newton become known in the scientific community through his refractive telescope – a big improvement on existing telescopes.
Isaac Newton disliked to hear any criticism and he became embroiled in a bitter row with Robert Hooke, an original member of the Royal Academy.
After the death of his mother in 1678, Newton entered six years of intellectual seclusion where he only communicated with the briefest notes.
It is claimed Newton’s discovered the theory of gravity after watching an apple fall in the orchard.
Throughout his life Newton continued research into a wide range of subjects including mathematics, optics, astronomy and alchemy.
Newton was interested in the new wave of philosophy becoming known in the Western world. He became an acquaintance of the political philosopher John Locke.
He was elected as Member of Parliament for the University in 1700, but only held this post for a year.
Newton himself would tell the story of an apple falling from a tree giving him inspiration for his work on gravity. However, there is no evidence he was actually hit by an apple!
Newton’s book – Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), has been called the single most influential book on physics
In 1696, Newton was appointed warden of the Royal Mint. He took his duties very seriously, seeking to prevent corruption.
As master of the Mint, Newton moved the British currency, from the silver to the gold standard.
Newton was fascinated with religion, though didn’t hold orthodox views. He wrote an article on textual criticism of the Bible.
One of Newton’s most famous quotes was:
“If I have seen further it is by standing on the shoulders of giants.”
English poet Alexander Pope wrote the following epithet for Newton.
“Nature and nature’s laws lay hid in night;
God said “Let Newton be” and all was light.”
Newton died in 1727, at the age of 85
two masses when there center is separated by distance r then the gravitation force between them is
F=G*((m1*m2)/r^2)
Newton's law of universal gravitation states that a particle attracts every other power particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
also consider that the ratio of CGS and SI value of g is 10^-3
calculate the gravitational force b/w 2 electron saperated by 1m?
vector form of law of gravitation
***************************
vector have both magnitude and direction
fig
m1----r----m2
force from m1 to m2 will be f12
force from m2 to m1 will be f21
so they have obeyed the thirdlaw of newton...every action has and equal and opposite reaction
f=Gm1m2*(-r^)/r^2
f=-Gm1m2*(r-->)/r^3 (we just multiplied r/r to the first equation to make r^ to r--> vector)
--------------------------------
F=(-Gm1m2*(r-->))/r^3
--------------------------------
characteristics of gravitational force :
1. Gravitational force is always attractive. For example, earth always attracts us but never repels
weakest force in nature : gravitational force < weak nuclear force < electromagnetic force < strong nuclear force
2. It is weakest force in nature.
3. It obeys inverse square law. Let us discuss it:
If there are two objects of mass m1 and m2 and they are placed at distance r apart. Then force between them will be:
F = G(m1m2)/r^2
4. Gravitational force is a central force.
5. It is a conservative force.
6. They can operate over a very long distances.
7. Graviton is the particle exchanged when the two masses attract through gravitational force. This exchanged particle is called graviton.
Note: If you know more properties then please share
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