Newton Definition and 527 Threads

I was wondering if any of you could explain how Newton derived his Law of Gravitation: F=G*m_1*m_2/r^2 ? If this question is to vague tell me, thanks guys.

a small button is placed on a horizontal rotating platform with diameter 0.320m will revolve with the platform when it is brought up to a speed of 40.0 rev/min, provided the button is no more that 0150m from the axis. what is the the coefficient of static friction between the button and the...

I admit that dark matter is apple pie and motherhood. I love Dark Matter just like you. But this paper has been accepted for publication in Physical Review Series D they did not post the preprint at arxiv until it had passed peer review and been accepted. this is a 72 page paper. we cannot...

http://www.thefinaltheory.com/pages/1/index.htm Have you guys seen this yet! The author is crazy. :eek: :eek:

Does anyone know how to solve this?

A 79.0 kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations? (a) when the elevator is accelerating upward with an acceleration of 1.80 m/s2 ? N (b) when the elevator is moving upward at a constant speed ? N (c) when the...

say i have a closed system of two weights in evacuated space on some distance between them. at the beginning they start the mutual attraction without initial push. conservation of impulse requires: d(p_1+p_2)=0 d(d(m_1x_1+m_2x_2)/dt)=0 if x_1=D_1 and x_2=-D_2 then you get the law of lever as...

we all learn this law. It state that the force between two bodies of mass m_1 and m_2 is attractive in nature. The gravitational attraction F is directly proportional to the product of the masses of the two bodies and inversely proportional to the square of the distance between them. From the...

I remember reading somewhere that some Law of Newton was wrong according to Einstein's theories. Does anyone know something about this?

Newton must respect the law of lever as we all must. The law of lever is the 1st law ever in physics and every thing must agree with it. \documentclass{article} \begin{document} \section{Newton must respect the law of lever} \hspace{1 cm}I know most of you will object me as I'm the first...

I wonder, is there out someone disbelieving quantum mechanics but accepting the concepts and statements of Newtonian mechanics? I would like to hear such standpoints.

160 Newton box sits on 10 meter long frictionless plane inclined at an angke of 30 degrees to the horizontal. calculate the amount of work done in moving the box from the bottom to the top of the inclined plane.

Horrible Homework: Q. Hydrogen and oxygen in a sample gas have the same temp. This means the hydrogen molecules, on average, have the same: (a) speed, but less K.E. (b) K.E., but more speed (c) speed, but more K.E. (d) speed and the same K.E. (e) K.E. but less speed. I have no idea how...

Newton’s first law was actually Galilean idea. It was Galileo who first thought that once we succeed eliminating all the friction from the surface one object slides on the object would slide forever. Newton had only royal style of putting it: “Subjected to no force the object will preserve...

I am writing an essay on why Galileo's work was important to the development of dynamics, with particular reference to its importance to the development of Newton's Laws of Motion and the Law of Universal Gravition. I've researched some of the stuff that Galileo did: ie. rolling balls down...

An automobile is going up a grade of 15 degree at a speed of 30m/s. the coefficient of static friction between the tires and the road is 0.7. a) What minimum distance does it take to stop the car? What minimum distance would it take if the car were going down the grade? I know how to get the...

To drag a 75kg log along the ground at constant velocity, you have to pull in it with a horizontal force of 250N. a) what is the resistive force exerted by the ground? b) what horizontal foce must you exert if you want to give the log an acceleration of 2m/s^2...

What modern physics experiments could you, brought back to the time of Newton, have reproduced with then existing technology?

It is almost time for the end of term exam and I am looking over my old exams and am confused by one problem. Masses m1,m2,m3,m4 are cnnected together(by a "string") on an incline theta = 22 degrees. m1 and tension = T1(connects m1 and m2) start nearest the bottem of the ramp, and a force F =...

Today, I was casually perusing the general physics forum when i came across this thread:Mass of Light? and Zlex posted What I wish to discuss is whether it was truly good science to simply disregard the mass of light because it is so small. Due to Newton's lack of knowledge in the...

Hello, I am a junior in High School and some of my friends in my physics class and I have a study group for our weekly bookwork that our teacher assigns. We have tried all week to figure out this one problem but to no avail. The problem is as follows: Two forces are applied to a car in an...

Matt Visser has a neat derivation of the Schwartzschild solution of Einstein's equations from Newtonian gravity, the covariances of special relativity, and a plusible sounding heuristic. http://arxiv.org/abs/gr-qc/0309072 Enjoy.

Many moons ago, when I used to teach Modern Physics to engineering undergrads, I told them that to get to quantum mechanics from classical mechanics, we had to start from the Hamiltonian as opposed to Newton's laws. I told them that the reason was that Newton's second law for a particle...

I was just watching a video documentary entitled "Me & Isaac Newton". It contains interviews with some experts in certain fields of science (for example, Michio Kaku was their to explain how he started out in Theoretical Physics and what he believes the future of Science is). One comment was...

Simon Baron-Cohen of Cambridge University and Ioan James of Oxford University have concluded that Albert Einstein and Sir Isaac Newton exhibited symptons of Asperger Syndrome, a form of autism. http://story.news.yahoo.com/news?tmpl=story&u=/nm/20030501/od_nm/science_autism_dc_5

http://www.geocities.com/dr_physica/moa.zip is a delphi program showing how my method of approxim outperforms/beats the Newton's one while looking for sqrt(2) try the case A+B=2*sqrt(2) and see the magic!

THE MAN WHO DOESN'T SLEEP MEANS NO HARM WITH THIS THREAD. Newton the 1st states: when no force acts upon one object its speed is constant. this means that at that time (F1,V1)=(0,const).now if this speed drops down to zero the force will rize to some nonzero value and then...