What is Newton: Definition and 524 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. S

    Solving Newton's 2nd Law: Wx = W Sin θ

    Hi, Can someone please explain to me why Wx (in the attached diagram) will be W sin theta instead of normally as W cos theta? I don't really understand the explanation that was given - "it is more useful to express the components of W in terms of the angle theta which the inclined surface...
  2. A

    Does Newton's Law of Gravitation Apply in Outer Space?

    Hello I studied about the Newton law of Gravitation which states that in universe every matter attract each other with a force which is denoted by F= Gm1m2/r^2. But in my view it is only happen within the region of gravity of a matter. but not in the space. please can anybody help me in...
  3. A

    How is a Newton a Unit of force, doesnt include direction

    If force includes strength/magnitude and direction, then why do we say a Newton or Pound is a unit of force? Isn't it more a unit of the magnitude of force? Please help. Now that i have been thinking about forces always having direction, this is all confusing me. Thanks
  4. V

    How did Newton discover law of gravitation

    The law of gravitation states force between two point masses m and M is proportional to their product and inversely proportional to the square of distance between them. So I'm just curious to know how did Newton discover this law? What kind of experiments he did to derive this formula? I want...
  5. M

    Understanding Newton's Ring Experiment & Why Rings are Circular

    Hi... Having problen in understanding Newton's ring experiment ? And why are rings circular in shaoe ? Thanks in advance...:)
  6. D

    Newton and Leibniz approach to differentiation

    Newton and Leibniz both had a method of differentiating. Newton had fluxions and Leibniz had something that resembles the modern derivative. Historically, does anyone know how they went about calculating the derivative?
  7. Saitama

    Newton law's - Finding acceleration

    Homework Statement (see attachment) Homework Equations The Attempt at a Solution I assumed that the acceleration of 5M is towards the right and is ##a##. Moving to the frame of 5M, the other two blocks experience a pseudo force. The forces acting on M are the tension in the...
  8. Z

    Photon absorption - Newton vs. Einstein

    A note from Newton's Principles definition #4 in 1687: Impressed Force - This force conflicts in the action only; and remains no longer in the body when the action is over. In Einstein's second paper on relativity in 1905, he explicitly concludes: "Radiation carries inertia between...
  9. A

    Einstein and Newton and gravity

    According to GR gravity is not a force so what is gravity according to GR? And according to Newton gravity is a force. Who's right and why?
  10. H

    Newton vs Einstein: Mass & Special Relativity

    in the special theory of relativity. nothing can move faster than photon but in netwon, if mass changed it effect right away though how far the two mass how can i understand??
  11. R

    John Nash, Newton and F. Lee Baily walk into a bar.

    I am (relatively) new to your forum and do not know where to post my question. I am kinda well-read in Physics and Math, but very not educated or trained in either. I am personally interested in the fuzzy area where Math, Physics and (patent) Law cross paths. The Problem: "I need help...
  12. chaszz

    What hath Newton wrought in the two centuries after his death?

    I know that Newton's work made possible the Industrial Revolution, but I don't know how. I understand his impact on subjects like astronomy, gravity, and predicting motion, but not on mechanics and industrial technology. The steam engine was the most important machine in the early Industrial...
  13. J

    The concept of inertial mass from Newton to Einstein

    The most common definition of mass, at least in the Newtonian context, is in terms of a measure of inertia: The mass of an object is a measure of, and gives rise to, its resistance to changes in motion. F=MA presumably quantifies this idea of inertial mass. I'm wondering whether any...
  14. O

    Do we need any assumption when using Newton ring's formula ?

    Homework Statement 2t=nλ, t=thickness , n=the number of rings counted, λ=wavelength. Which diagram is correct? Homework Equations The Attempt at a Solution I think the vertically down and up is correct for the using 2t=nλ, but the curved surface should make the incident angle...
  15. Q

    Laws of Newton short question?

    So I am studying the laws of Newton and I am wondering,are there any deficiencies related to the laws?I mean,somewhere where I can't use them or anything?
  16. S

    Differences between Newton Raphson & Gauss Seidel Methods ?

    Differences between Newton Raphson & Gauss Seidel Methods !? hello everyone ... can anyone please summarize me the differences between Newton Raphson & Gauss Seidel Methods in load flow study !? I'll be really thankful
  17. A.T.

    Animated Gravity : Einstein vs. Newton

    There are many threads about this on this forum: People are confused about the basic idea of Gravitation in General Relativity. They understandably don't understand how the very common balls-on-rubber-sheet-analogy explains anything. I usually post those two links to help them...
  18. DiracPool

    Newton vs Einstein: Who Revolutionized Physics?

    Sorry guys, but this was the logical follow up of my previous thread. Your mission, if you choose to take it, is the following: who better "revolutionized" physics, Einstein or Newton? For now we will leave the question this simply, I may push for more clarifications later. Give your reasons.
  19. DiracPool

    Calculus Wars: Newton vs Leibnitz

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  20. Evo

    News Professor claims Newton Ct massacre a hoax

    This one is a DOOZY! A professor at Florida Atlantic University claims that no one was killed at Sandy Hook Elementary school, "that trained “crisis actors” may have been employed by the Obama administration to shape public opinion on gun control."...
  21. J

    Understanding arithmetic and the Newton

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  22. DiracPool

    Comparing Newton & Einstein's Gravity: What Makes GR Better?

    Could someone explain to me what specifically distinguishes Einsteins more advanced treatment of gravity over Newtons? Here’s what I (think I) know. Newton described gravity as a “force” of attraction between two bodies or masses. That force was given by the G constant times the two masses...
  23. J

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  24. R

    Newton's Cradle Elastic Collisions: Solving for Ball Height with Varying Masses

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  25. U

    Is Calculus Really the Most Difficult Form of Math?

    So I read that at age 23 Newton went about inventing calculus, I've read different stories on who invented calculus but I'm not going into that here. So my question is Calculus is considered for the most part the most difficult form of math right? So how can a 23 year old invent it? I mean it's...
  26. L

    What is a Newton Unit? Explained Here

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  27. J

    Problem expanding algebraic function via Newton polygon

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  28. H

    Need help solving a differential equation involving a leaking water tank

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  29. P

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  30. C

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  31. A

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  32. L

    Newton's Second Law: Solving for Acceleration and Velocity | Homework Help

    Homework Statement http://postimage.org/image/810vdcuvf/ Homework Equations F=ma The Attempt at a Solution for part a) i put mdv/dt = -F(brake) - kv but is lost for what to put in for part b), help?
  33. L

    Long problem sum using Newton second law

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  34. R

    Newton 2nd law, forces and vectors

    A car of mass 1000 kg tows a caravan of mass 600kg up a road which rises 1m vertically for every 20m its length. There are constant frictional forces of 200N and 100N to the motion of the car and caravan respectively. the combination has an acceleration of 1.2ms-2 with the engine exerting a...
  35. R

    Rate of change of momentum. Newton 2nd law

    rate of change of momentum. Newton 2nd law (solved) hailstones with an average mass of 4grams fall vertically and strike a flat roof at 12ms-1 . In a period of 5 minutes, 6 000 hailstones fall on each square meter of roof and rebound vertically at 3ms-1 . Calculate the force on the roof if it...
  36. Saitama

    Newton Laws of motion question

    Homework Statement A rod AB is shown in figure. End A of the rod is fixed on the ground. Block is moving with velocity √3 m/s towards right. The velocity of end B when rod makes an angle of 60o with the ground. Homework Equations The Attempt at a Solution I assumed that at any...
  37. S

    16 year old solves 300 year old problem set by Isaac Newton

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  38. I

    Did Tesla and Newton Overlook Love for Genius?

    -Or other extreme geniuses who never had time for women. Imagine if people like that just took a few minutes out of their lives to populate the earth.
  39. D

    Newton's Third Law: Why Does Motion Occur?

    Newton third law! Hi fellow members! I would like to ask a silly question because my basic concepts are quit weak. Since according to Newton third law, with every action, an opposite and Equal force react to resist motion.Since both ACTion and Reaction forces are equal, they will cancel each...
  40. J

    Series Expansion Newton Dark Matter

    Hi, I hope you can help me. I am a physicist but not a researcher and have currently not the time to study many papers about the subject of dark matter. What I would need for deeper thoughts is an expansion in a series of the Newton law for cases where it has been measured that star rotation...
  41. I

    Calculating Force on a Man from Variable Mass Water Jet

    Homework Statement Water with mass density ρ are being shoot from a jet with cross sectional area A and velocity v0 at a man with mass m0. 1. Find the force acting on a man at rest (assume all the water are absorbed in the clothes) 2. Find the force acting on a man escaping at velocity v<v0...
  42. J

    Newton Law Gravitation - Multiple choice question?

    Newton Law Gravitation - Multiple choice question?? Homework Statement Newton’s law of gravitation can be applied to the Earth-Moon system. Which of the following statements is not correct? A The value of G at the surface of the Moon is the same as that at the surface of the Earth...
  43. A

    Quick Question: How Did Newton Explain Newton's Rings?

    Since Newton's rings are clearly a wave phenomenon, and Newton was a strong proponent of the particle theory of light, how did he explain this effect for which he is named? Thanks!
  44. J

    How Newton approximated force as change of momentum?

    why Newton had taken force as change in momentum per time? i mean i need to get physical interpretation?what is this force actually? also help me to get an idea about energy in sense(core concept)? not with some equations? i see these equations every time?but didn't know meanining? somebody...
  45. Saitama

    Newton Law's of motion question

    Homework Statement The velocity of end 'A' of rigid rod placed between two smooth vertical walls moves with velocity 'u' along vertical direction. Find out the velocity of end 'B' of that rod, rod always remains in contact with the vertical walls. Homework Equations The Attempt...
  46. J

    Problem understanding angular momentum and Newton 2nd law

    hi, thank you for any help. -[problem understanding angular momentum and Newton (second)2nd law] -[usual/classic problem of spinning bike wheel on rope doesn't fall] (from 28min:10s to 29min:15s and also 37:48 to 39:00)...
  47. F

    Does a Yank of 100 Newton Meters Affect a 5 Kg Rod?

    So Imagine that a force of 100 N is being applied continuously on face of 5 kg cylindrical rod (1 light year across) causing it to accelerate at 20 m/s^2. If the force was abruptly removed would the rod continue to accelerate a noticeable period of time before coming to a halt? The density of...
  48. B

    Newton measures the speed of gravity

    Homework Statement This doesn't come from a textbook but it's like a homework question so I thought it would be more appropriate here. I'm trying to figure out what equation Newton used since the force of gravity or the mass of the Earth was not known until Cavendish. I'm looking for an...
  49. P

    Understanding Newton's Second Law: How kgm/s2 Relates to Force

    Okay, so if we have the work Formula: ##A=Fd## we have units: ##N*m## which gives us joule ##J##, but if we have the formula of the force: ##F=\frac{mv}{t}## we would have ##\frac{kg * \frac{m}{s}}{s}## which gives us ##kg \frac{m}{s^2}##, so does that give Newton?
  50. 2

    Derivation of Newton Gravitation problem application

    Homework Statement I need to show that the first equation becomes the last. First sub in for r1 and r2 and then use the binomial theorem to expand to first order in d. Then use the assumption that d<<r1 and r2. To show it reduces to the last eqn **In the first eqn it is NOT r3 is should be r2...
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