What is Newton: Definition and 523 Discussions

The Newton is a series of personal digital assistants (PDAs) developed and marketed by Apple Computer, Inc. An early device in the PDA category (the Newton originated the term), it was the first to feature handwriting recognition. Apple started developing the platform in 1987 and shipped the first devices in August 1993. Production officially ended on February 27, 1998. Newton devices ran on a proprietary operating system, Newton OS; examples include Apple's MessagePad series and the eMate 300, and other companies also released devices running on Newton OS. Most Newton devices were based on the ARM 610 RISC processor and all featured handwriting-based input.
The Newton was considered technologically innovative at its debut, but a combination of factors, some of which included its high price and early problems with its handwriting recognition feature, limited its sales. This led to Apple ultimately discontinuing the platform at the direction of Steve Jobs in 1998, a year after his return to the company.

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  1. Borek

    Newton Papers Online - Notebooks & Principia Mathematica

    Interesting collection of Newton papers including notebooks and his own copy of the Principia Mathematica: http://cudl.lib.cam.ac.uk/collections/Newton
  2. J

    Difference between Newton & GR

    Can anyone please explain the difference between Newtonian and GR when used to describe gravity especially with reference to gravitational attraction inside an event horizon. Or how do we get over the problem of an object in freefall exceeding the speed of light as it approaches the singularity.
  3. L

    How Do You Calculate Initial Temperature Using Newton's Law of Cooling?

    A hot object cools down to a temperature of 10 degrees of Celsius during a period of 180 seconds. The room temperature is 10 degrees of Celsius. Assume the coefficient in the Newton's Law of cooling to be 0.01[1/sec]. Determine the original temperature of the substance 2. T(room) +...
  4. M

    Newton 2nd Law word problem help

    "Newton 2nd Law" word problem help Homework Statement When the click beetle jumps in the air, its acceleration upward can be as large as 400.0 times the acceleration due to gravity. (An acceleration this large would instantly kill any human being.) For a beetle whose mass is 40.00 mg...
  5. B

    Converting Newton to Joule: Understanding Energy Transfer in Crankshafts

    I want to know how Newton can be converted to energy (Joule). At least approximately... For example let's say a crankshaft transfer a force, - exactly 100000 Newton How much energy would be transferred be per second, - included all what is "lost" to heat etc..
  6. V

    Newton Polynomials through Specific Points

    I have completed a difference table for 4 points, x0, x1, x2, x3 and found the third degree poly that goes through these four points. Now I need to know how to make the polynomial of second degree that interpolates x0, x2, and x3. Do I just need to remake the table for 3 points, now excluding...
  7. K

    Newton second law involving a gallon of water

    Homework Statement a box filled of water is over at the beginning of a incline plane of 30 degree, it has a mass of 1 kg,from the bottom of the plane to the top is 10m, the gallon is pushed with a force of 10N to the top, and the gallon is leaking 0.01kg per second what is the final velocity...
  8. A

    Why doesn't Newton define F=m(a^2)

    Why did Newton define force as F=ma instead of stuff like F=m*(a^2) or F=(m^2)*a?
  9. R

    MATLAB I writing a program on MATLAB to implement Newton Raphson method

    Did anyone write a program before for Newton Raphson method on MATLAB. I need to try the program to solve 2 equations: cox=x^3 and x^4-0.5(x^3)+3(x^2)-x+3=0 Please Help me in this manner ASAP. AND THANK YOU
  10. J

    Comparing Gravity in Newtonian and Relativistic Frameworks

    I understand there is a slight difference in the value of gravity when worked out using Newton or relativity. The obvious example being mercury where Newtonian is slightly out and relativity accurate. Does relativity show a higher or lower figure or does the difference in working out mean you...
  11. M

    Extending run-time of Newton cradle?

    I got an idea the other day in class about Newton's cradles. I was wondering if you put one in a vacuum and started it, would it run for longer, as opposed to being in normal conditions because of sound's inability to travel through vacuums etc? Would anyone be able to clarify because I was...
  12. B

    Newton Laws/Dynamics: 3 Masses on an incline

    Mu1 is the friction coefficient , I'm sure I did it wrong because I got the acceleration isn't dependent on it, and it doesn't make sense. disregard the axis in the drawing - it's for another question. Homework Statement Find an expression for the acceleration of the system when there is...
  13. K

    Simple block tension Newton gravity problem

    The 4.00kg block in the figure is attached to a vertical rod by means of two strings. when the system rotates about the axis of the rod, the strings are extended and the tension in the upper string is 80N. A: What is the tension in the lower cord? B: what is the speed of the block? FIGURE...
  14. B

    Having trouble finding the tension of this Newton law problem

    Block A in the figure below has mass mA = 4.5 kg and is sliding down the ramp. Block B has mass mB = 2.2 kg. The coefficient of kinetic friction between block B and the horizontal plane is 0.50. The inclined plane is frictionless and at angle 30°. part a is to find the tension the equation...
  15. P

    Which way did Newton find F = ma?

    I was under the impression that, by experiment, Newton deduced \textit{F}\propto{m} \rightarrow \textit{F = k}_{1}\textit{m} (where \textit{k}_{1} is some constant) and \textit{F}\propto{a} \rightarrow \textit{F = k}_{2}\textit{a} (where \textit{k}_{2} is some...
  16. T

    Accelerated Newton method

    Homework Statement given f \in C^2 such that f(a)=f'(a)=0 ^f''(a)\neq 0 prove that the modified Newton method x_{n+1}=x_n-2 \frac{f(x_n){f'(x_n)} coverges with order two. Homework Equations if g(x) is an iterative function such that the first m derivatives of g at a are zero and...
  17. Femme_physics

    Does Mg Stand for Newton in Scientific Contexts?

    I'm reading this question that says "The 5.5-Mg humpback whale is stuck on the shore due to changes in the tide..." Does Mg mean Newton?
  18. F

    Should I live a life of solitude like Newton and Euler?

    Yeah is there any correlation between being single for the rest of your life and very successful in Math/physics?
  19. Alain De Vos

    Stargazing Observing the sun with Newton telescope

    While making a projection of the sun on a paper with a Newton telescope, I’m able to see a white ball or to make burning holes in paper. My idea however is to be able to see something more spectacular , like sunspots or protuberances. Does someone has an ideas how to do this practically...
  20. N

    Difference Between Newton and Einstein

    I was watching a lecture by Walter Lewin, when he started talking about the radius of an event horizon and the mass of its black hole. I was confused, because I thought that black holes were relativistic things. But then I realized that special relativity deals with things moving at velocities...
  21. T

    Newton law Applications. Any suggestion

    A mass M at To =0 s has a speed of lVol in the positive X direction. The floor has a coefficient of static friction of Us and a coefficient of kinetic friction of Uk. How far will the mass M travel? mass = M @ To = 0s speed = Vo coefficient of static friction = Us coefficient of Kinetic...
  22. E

    How Does Applying 1 Newton of Force Affect an Object's Motion?

    I understand that a Newton (N) is the "amount of force required to accelerate a one-kg object at 1 m/s^2", but what exactly does that mean? If I apply 1N of force to a 1kg object, will it constantly accelerate if I continue to apply the 1N? E.g. If I apply 1N of force for 10 seconds, the...
  23. Q

    Newton I application problems

    Homework Statement A passenger in a moving car is thrown forward when the car stops suddenly. Explain why this happens with reference to Newton's First Law. Homework Equations The Attempt at a Solution "An object at rest stays at rest and an object in motion stays in motion...
  24. I

    Newton rings: spherical droplet with thin film interference

    Homework Statement So I have a similar situation with the traditional Newton rings. Instead of having however a convex lens, I have a (partial) spherical surface with height d with sitting on top of a thin film of thickness t, with d >>> t, and refractive index n and below the thin film is a...
  25. F

    How can I find the force needed for constant velocity with known variables?

    Homework Statement Hi. My task is to find the Force F, so that velocity is constant. I know that the velocity is constant, therefore the sum of all forces must be zero! On the image I have used vector decomposition (the black lines). The orange ones are the vectors. I know that the...
  26. Q

    Understanding Normal Force: A Simplified Explanation

    Homework Statement A book rests on a table. Identify the NIII force pairs. Homework Equations The Attempt at a Solution Downward force of book on table; upward force of table on book (N). Downward force of book and table on ground; upward force of ground on book and table (N)...
  27. J

    Newton and Leibniz's versions of calculus

    I am currently trying to research the calculus performed by both Newton and Leibniz. Specifically, their use of limits and infinite series in each of their versions. However, I am having some trouble finding any information regarding this. I know that Newton, for example, founded his version...
  28. D

    How Did Newton Find Acceleration due to Gravity? (If he had, indeed)

    Well, this is my first post here. :biggrin: Hoping for fun times. So, straight to topic, my title describes what I want to know. I tried searching online, but I did not come upon anything that explains how Newton came to find the value 9.8m/s^2, or even whether he did. Also, if you happen...
  29. J

    Simple Question on Earth Rotation involving Newton III

    Simple question with a simple answer, just want a little more description. Newton III states: For every action there is an equal and opposite reaction. As the Earth rotates one way, what's the opposite force that keeps it "balanced"? Inertia? Arrived at the question when was thinking...
  30. J

    Applyings Newton 2nd Law and Kinematics

    Homework Statement A 10,000 kg rocket is acted upon by a upward thrust of 118,000N How fast will the rocket be moving after 20 seconds? How far will it have moved in this time? Also, how do i determine the net force Homework Equations a = \SigmaF/m d=1/2at2+vit The Attempt at a Solution...
  31. T

    Have you tried using ridge regression to solve for a singular Jacobian matrix?

    I have a nonlinear system of equations and am using the Newton raphson method to solve for them. The method is basically as follows: J*dx = -F, where J is the jacobian matrix, dx is a vector whose elements are the changes to x, F is a vector whose elements are the function values at x. To...
  32. S

    Newton-Raphson Method for Solving Tan(x) = x with 3 Iterations

    Hi Please can somebody help The equation governing the buckling load P of a strut with one end fixed and the other end simply supported is given by tan (Mu)L = (Mu)L where (Mu) = Sqrt (P/EI), L the length of the strut and EI the flexural rigidity of the strut. By writing x = (Mu)L, solve...
  33. S

    2nd and 3rd Newton Law Problem

    Consider the figure below where the coefficient of kinetic friction between the m1= 2.0-kg and the m2 = 3.0-kg blocks is 0.30. The hanging mass is given to be m3 =10.0-kg and the horizontal surface supporting the blocks along with the pulleys are...
  34. J

    Do you think Newton is a bit overrated?

    I admire Newton's work and agree that he was a great scientist. He came up with many new original ideas. But there are many other scientists who are equally or perhaps more great who are not held as high as Newton. Some of the names which I could think of off hand are: Archimedes, Leibniz. My...
  35. G

    Newton raphson ,have a problem

    Hello , i have a Newton raphson algorithm. The problem is that it isn't making the loop and of course not giving a result. I tried two cases. One with " if ((f1>eps) && (fd1>eps)) { while ((error>eps) " and one instead of the above " while ((error>eps) && (fd1>eps) &&...
  36. N

    Solve Newton's Cooling Law: Find m with c and t=10 mins

    Homework Statement An object of temperature 60oF is placed in a medium maintained at a constant temperature moF. At the end of 5 mins thetemperature of the object is 45 oF and after another 5 mins its temperature is 36 oF. Find m Homework Equations y=cekt+m The Attempt at a...
  37. Z

    Did Newton believe in a personal or impersonal God?

    i'm too lazy to do the research
  38. A

    The Physics Behind Tablecloth Trickery: Newton & Inertia

    What exactly happens when a tablecloth is pulled out from underneath a table setting, and everything on the table stays put? Newtons laws certainly applies to it but maybe inertia as well?
  39. D

    Was Galileo, Kepler, or Newton more important?

    Hi, I have to pick one of these great scientists to write a middterm item on, so basically I'm curious about what you personally think would be the easiest answer to argue to this question: Which out of Galileo, Kepler or Newton was of the greatest significance in changing the scientific...
  40. A

    One brick on another (friction, laws of Newton)

    Homework Statement [PLAIN]http://img693.imageshack.us/img693/8219/utennavnu.png Homework Equations n= normal force µ*n=friction F=ma. T = tension , mA = mass of A, mB mass of B The Attempt at a Solution a) Static friction should be used. Forces on brick A : x: T - µ*mg=0 y...
  41. B

    Solving Newton's Laws of Motion Problems - Step-by-Step Guide

    I'm having some difficulty with some sample questions. I have the solution to the problems. but i don't know how to work through the problem to get to the solution. 1.what is the mass of the object? details: Two strings are holding up an object. string 1 is 30 degree and 23N. string 2...
  42. haushofer

    Is the Newtonian EOM Invariant under Galilei Boosts?

    Hi, I have some questions concerning Newtonian physics which confuse me, especially the Galilean boosts. First of all, the Galilei group is x^i \rightarrow R^i_{\ j}x^j + v^i t + d^i, \ \ \ \ \ \ \ \ x^0 \rightarrow x^0 + \xi^0 where R is an element of SO(3), v is a constant velocity, d is a...
  43. N

    Another Newton law theoroy question

    Homework Statement pushing an armchair across a carpeted or at constant speed v you apply a force of 100N if you push same chair at constant speed 2v(twice as fast) you mush push with a force? a)100N B)141N The Attempt at a Solution Newtons second law? if the net force acting on...
  44. S

    What Does Same Type Mean in Newton's Third Law?

    my question is as follows. when an object x exerts a force on object y, then object y exert a force of the SAME TYPE that is equal in magnitude and opposite in direction on object x Explain what is meant by of the same type in this statement?
  45. marcus

    Entropic force correction to Newton law by Modesto and Randono

    The paper is impressive. I'll get the link. Here http://arxiv.org/abs/1003.1998 On our 2nd quarter 2010 MIP ("most important paper") poll, I noticed that Atyy picked both of the Randono papers. It made me think about this one, that came out in March---the first quarter of 2010, so not on the...
  46. A

    Newton third law and finding the reverse distance

    hi am new here ... and sorry for my weak English i have a question and a problem in physics that i need to know it's solution i will give you the main idea without numbers and you can assume any numbers that you find it suitable for the problem... the problem say: if a small ball is...
  47. A

    Newton vs Einstein: Conflict & Division of Physics Theories

    What was the conflict between Newton and Einstein? what they division Classical and Modern Physics after after theory of relativity?
  48. P

    Schwarzschild and Newton potential

    Expressing the Schwarzschild in the Weyl form allows one to use the Newton potential. The Newton potential here is, perhaps surprisingly, equivalent with a rod of length 2M and mass M. Also the rod is exactly positioned where r = 2M. Furthermore if we decrease the length of the rod to the...
  49. brainpushups

    Was Newton able to analyze perfectly elastic collisions?

    I am unaware of any other method for analyzing elastic collisions other than applying both conservation of momentum and conservation of energy. Since Newton didn't have conservation of kinetic energy to use as a tool was he unable to analyze elastic collisions? PS In the Scholium at the end...
  50. A

    Newton 2nd law of a fish in an elevator

    Homework Statement A person weighs a fish of mass m on a spring scale atached to the ceiling of an elevator. (a) Show that if the elevator accelerates either up or down, the spring scale gives a reading different from the weight of the fish. Homework Equations \SigmaFy=T-Fg=may...
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