What is Machine: Definition and 968 Discussions

A machine is a human-made device that uses power to apply forces and control movement to perform an action. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement. They can also include computers and sensors that monitor performance and plan movement, often called mechanical systems.
Renaissance natural philosophers identified six simple machines which were the elementary devices that put a load into motion, and calculated the ratio of output force to input force, known today as mechanical advantage.Modern machines are complex systems that consist of structural elements, mechanisms and control components and include interfaces for convenient use. Examples include: a wide range of vehicles, such as automobiles, boats and airplanes; appliances in the home and office, including computers, building air handling and water handling systems; as well as farm machinery, machine tools and factory automation systems and robots.

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  1. G

    Atwood Machine pulley homework

    Homework Statement A pulley with mass Mp and a radius Rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot. Mass M2 is larger than mass m1. The quantities Tn and g are magnitudes. 1) The magnitude of the acceleration of m1 is ...
  2. BrainMan

    Machine gun conservation of momentum problem

    Homework Statement A machine gun held by a soldier fires bullets at the rate of three per second. Each bullet has a mass of 30 g and a speed of 1200 m/s. Find the average force exerted on the soldier. Homework Equations FΔt = mgf-mgi The Attempt at a Solution I attempted to do this...
  3. S

    Finding acceleration of an Atwood's machine

    Homework Statement Two masses are suspended from a pulley: http://i.imgur.com/B4x8pzx.png mass of pulley = 0.20kg radius = 0.15m constant torque = 0.35Nm due to friction between the rotating pulley and its axle m1 = 0.40kg m2 = 0.80kg What is the acceleration of the suspended...
  4. G

    Finite state machine (Digital) Sequence

    Hello, here is the problem that I have: Can you please tell me how to determine what is the sequence of the output. I can see it misses 101 and 010 and it repeats 000 and 100. I think both 101 and 010 are initial states. The answer I have for repeated sequence is 011, 111, 110, 100...
  5. M

    Pneumatic filling machine

    im designing a pneumatic filling machine with four filling heads. in all 7 cylinders are working simultaneously through p l c. the filling volume will be 100 ml/bottle within 6 seconds. what should be the working pressure of air so that i can decide the capacity of compressor. the bore size of...
  6. heterotictype1

    Idea for a perpetual motion machine

    If someone were to send a probe out to interstellar space, bring it to a full stop and start rotating, would it continue rotating eternally? Or would drag from errant plasma slow it?
  7. R

    Derive the State Machine from Input Sequence

    Homework Statement This is a 3 state machine with one input variable. The input given for x produces the output sequence for z. The machine starts in state A. I am asked to derive the state table. x=010001010010010011010 A z=001000000001001000001 Homework Equations The Attempt...
  8. K

    If we could put Earth in a weighing machine

    ... regardless of any possible technical problems, and then, on earth: a) someone throws an object in the air and it falls b) someone puts an object to float in a magnetic field generated by an artificial magnet that lays on earth In situation A I think the weight measured would...
  9. J

    Java Javascript squareroot algorithm and machine epsilon

    So I made a little application to show the steps of approximating a squareroot using the Babylonian Method: http://jaminweb.com/squarerootCalc.html It's not working all the time. When I do the squareroot of 25 starting with an initial guess of 3.1, it works: Applying...
  10. mrmjp

    Programming Microcontrollers - C vs Machine Code

    What is the most commonly used programming language for microcontrollers? I have done programming in machine code and it is a pain. I will get better at it if I have to, but would rather use a high level language like C. I hear C is much easier to write programs with than machine code...
  11. T

    What does a Wolpert's machine do?

    Here is a description of Wolpert's machine from an article published on livescience.com, but I did not understand anything. Would you please care to explain it for me? "Basically, Wolpert — building on previous work by Alan Turing — formalized a description of "inference machines," i.e...
  12. jbunniii

    Kleppner - Pedagogical Machine

    Edit: I think I may have found my problem. See my second post below. Homework Statement I'm trying to solve this problem from Kleppner and Kolenkow: But I seem to be missing something because my answer doesn't match the clue. I have worked out the entire problem but I want to focus on...
  13. P

    Work done on a mass by an ideal machine

    Hello, I am new. I hope that this is the correct place for this kind of question. I apologize for it being so long or annoying. Homework Statement An engineer that has a mass of 100kg has made an ideal mechanical advantage machine shown in the attachment. Platforms 1 and 2 are...
  14. S

    Famous math problems in machine learning and AI ?

    "famous" math problems in machine learning and AI ? Are there any "famous"(i.e. crucial) unsolved mathematical problems in the field of machine learning or the general study of artificial intelligence? There is interest in programming computers to solve problems by artificial intelligence...
  15. U

    Understanding Atwood's Machine: Forces, Diagrams, and Gravity Explained

    Atwood's Machine, with one pulley and two weights, is analyzed with two free body diagrams. Each diagram depicts the forces applied to each weight. If the weights are connected, why isn't gravity considered to be pulling on both weights in the same direction? (Meaning, why aren't the masses for...
  16. J

    Signal Processing Vs Machine Learning as a career

    Hello, I have an undergraduate degree in EE and I have a passion for mathematics. I'm trying to decide if I should do a masters in signal processing or machine learning. What are the pros and cons of each given the way the industry is? (I live in Bangalore, the tech capital of India, where...
  17. kini.Amith

    Design of a machine/ machine component

    I have an assignment for which I have to design a machine component (or structure) of my choice after estimating the loads that may arise on normal use. We are expected to use the things we have learned in our Machine Design course like design of clutches, brakes, shafts,couplings,power screws...
  18. FOIWATER

    Issue with energy conversion in synch. machine

    Hello, Assume a synchronous generator is running unloaded and has a fixed input power for any given short time frame (which is a practical consideration for electric power plants). When an electrical load is applied, the machine slows down. I understand this.. what I don't understand is the...
  19. B

    Pinball machine problem on energy/power/work

    Homework Statement A pinball machine has a spring that loads up, and shoots a small ball up a shallow incline. The mass of the pinball is .05kg. The incline for the pinball is 15 degrees. Assume no friction exists along the distance over which the spring applies its force. The coefficient...
  20. M

    How do you calculate the theoretical packs per minute of a machine

    I am wanting to calculate the theoretical packs per minute of a machine. The machine pushes packs into a indexing conveyor and is transported along the conveyor and is cross pushed on to an exit conveyor. Each pack is 144 mm long and the machine indexes every 0.65s plus a 1.4 second dwell for...
  21. FOIWATER

    Torque input of synchronous machine

    I am reading from grainger about transient stability. I know this will be a amateur question, but... It says that when a prime mover is turning a synchronous machine, there is a equal and opposite counter torque (electrical counter torque) when the machine rotates at synchronous speed...
  22. Lksllks

    Landis crank shaft grinding machine

    :cry: is there anybody know about the landis crankshaft machine! I got a knotty problem! Please help!
  23. S

    C426913 Can a Perpetual Motion Machine Ever Be Possible?

    perpetual motion machine ! i read many of this papers but it violates the first law of thermodynamics . can it come true one day
  24. J

    Mechanism for a wheelchair exercise machine

    I'm looking for some advice for my final year project at university. My project is a design of an exercise machine for wheel chair users . The machine will look like a standard wheel chair but the wheels are a couple of centre meters off the floor. I want to add a mechanism to the wheels which...
  25. R

    Dough rounding machine inner workings

    Hello, I have seen a machine that can round bread dough very easily and don't undestand how the movement is achieved. Watch these videos please: http://youtu.be/fFjovsZokcc http://youtu.be/6gicSTS-nCo?t=13m35s http://youtu.be/2VF_ipbpgAM?t=4m42s As you can see, there are 2 drums that...
  26. T

    How does machine learning work according to this article?

    From an article published on the Atlantic ( http://www.theatlantic.com/magazine/archive/2013/11/the-man-who-would-teach-machines-to-think/309529/ ) : "The technique is called “machine learning.†The goal is to make a device that takes an English sentence as input and spits out a French...
  27. M

    Machine Design - How To Determine Motor HP Etc.

    I am planning a build on a simple 4-wheel-drive cart for hauling equipment for my business up/down yards with grade. 4 wheel cart will have weight capacity 1500 lb with potential of crossing up to 35 degree slope (slow RPM/high torque/motor brake necesary.) This will implement a 110V AC...
  28. P

    Atwood machine with two ropes on one of the blocks

    Homework Statement Block 2 has a mass of 10kg and is attached to a pulley. The string going through the pulley is fixed to a bar on one end. The other end of the string goes over a pulley and a cylinder, of mass 20kg hangs on the string. The coefficient of friction between block 2 and the...
  29. K

    Could a warp drive work as a time machine?

    I'm sure you've heard of the warp/Alcubierre drive that would work by expanding space behind it and contracting it in front to achieve faster than light travel. I was thinking about this the other day and was wondering if this concept could be applied to time as well to allow time travel. Would...
  30. D

    Spring powered putting machine

    Homework Statement I am currently enrolled in a Engineering Drafting class. We are working on a group project where we are making a putting machine. We decided on a spring powered device. The ramp's measurements look like this where the goal is to get it into the hole at the end of the...
  31. EVriderDK

    How to remove fog, created with a smoke machine (Glycol and water)

    Hey. I really want to know if it is possible in some way, to remove the fog created by a smoke machine. The fog is created from heating up glycol and destilled water at 300 degree C
  32. G

    Numeric linear algebra or machine learning

    I'm an EE/applied physics student (probably interested in an academic path involving signal processing, programming, computation, mathy stuff) with a hole in my upcoming schedule. The choice is basically between these two courses - numeric linear algebra and a course called "neural networks and...
  33. S

    ARM Cortex-M Machine Code Help

    Homework Statement Hey guys. I am just learning machine code for Cortex-M. There are a few exercises within the textbook, however, I am not entirely sure if I am doing them correctly. If you could possible look over my work to see if there are any mistakes, I would greatly appreciate it! They...
  34. T

    Double slit: Human vs Machine Observer

    Would someone help me to understand what would happen in this situation. w→ x→ (y)→ z Photon emitter is at point w emitting photons one at a time. Double slit is at point x. Screen is at point z. There is a detector at point y (after photon has already passed through slits) which is capable...
  35. B

    The Earth as its own nuclear magnetic resonance machine

    My physics buddy and I have been having a debate. I was claiming that even under the natural Earth's magnetic field that with good signal to noise ratio based on the radar systems scaled appropriately the top layers of the Earth could be seen. He claimed that the signal to noise ratio of the T1...
  36. T

    Atwood Machine: Acceleration of m1

    Homework Statement Three objects with masses m1 = 35.1 kg, m2 = 16.8 kg, and m3 = 10.5 kg are hanging from ropes that are redirected over pulleys. What is the acceleration of m1? Negative numbers for downward, and positive numbers for upward, please. Homework Equations F=ma...
  37. S

    Can a Turing Machine Execute Multiple Programs?

    Hi: I read many articles about turing machine,but i still confused:confused: is a turing machine can only execute one program(hardwired) ? or it can execute many programs(like a conventional computer)? i asking about turing machine as shown in figure blew(not asking about universal TM...
  38. K

    Why perpetual motion machine wouldn't work.

    I'm trying to explain to my friend why the following would not work, but embarrassingly, I'm having trouble. You have a ramp that allows a ball bearing to roll up, and a strong magnet at the top which is able to pull the ball up the ramp. But there is a hole halfway up the ramp, and so the...
  39. J

    Java Unable to run Java applet on my machine

    Hi, I'm running Internet Explorer 10 and when I go into manage add on, I see Java is enabled. However, when I try to run the applet in this link http://www.certicom.com/index.php/33-experiment-an-elliptic-curve-model-over-fp about elliptic curve cryptography, I'm unable to run it. I...
  40. Z

    Operating Machine A with Machine B: A Technical Guide

    Dear Engineers, Asslam u Alaikum(May peace be upon all of you) I have machine A, rotates at 3000 rpm and required torque to rotate is 10 NM. I want to operator this machine with an other machine B(motor) of 1500 rpm which can gives the torque of 7 NM max. bc i m Electrical person and don't...
  41. H

    Why Machine epsilon is defined this way?

    Hi. I'm studying numerical methods so I found this subforum the most correct for this question. The machine epsilon for a computer is defined as the least number e such that 1 + e is different to 1. I just wonder, why 1 + e? And not 2 + e for instance? Thanks!
  42. Saitama

    Newton's laws - Pedagogical machine

    Homework Statement A "Pedagogical machine" is illustrated in the attachment. All surfaces are frictionless. What force F must be applied to ##M_1## to keep ##M_3## from rising or falling? Ans. clue. For equal masses F=3Mg Homework Equations The Attempt at a Solution I would like...
  43. E

    Machine A and machine B are performing the same task

    [b]1. Machine A and machine B are performing the same task. Machine A is causing twice the entropy change of machine B. Which would you rather use and why? [b]3. I would choose Machine B. Lots of disorder = high entropy, while order = low entropy.
  44. C

    Atwood machine with forces, not masses

    I am having difficulty reconciling this in my head. Imagine two Atwood machines (example). In both machines, the pulley is massless, there is no friction, but the rope is not massless, though it is inextensible. The rope and pulley in each machine are identical. The first is a traditional Atwood...
  45. S

    Engraving laser machine with a lens

    Hi I have a laser beam(engraving laser machine) and then use a lens for focus the beam but my lens has a crack on the center of lens and when i use my laser in high power the beam diameter will bigger and burning area zone is bigger so: 1- Does the crack doesn't let the maximum focus?in law or...
  46. marcus

    Beyond LHC without a machine (new physics from cosmic rays)

    Bee Hossenfelder has an interesting post I'd like to get some comment on http://backreaction.blogspot.com/2013/07/more-mysteries-in-cosmic-rays-and.html More mysteries in cosmic rays, and a proposed solution "...One mystery we already discussed previously. The “penetration depth” of the...
  47. dexterdev

    Machine learning as a career (in India or abroad)

    Hi all, I recently got very interested in machine learning and neural networks etc. Although I am having a taste for mathematics , I haven't rigorously learned any mathematics course because my background is electronics engineering (masters level). And also I am not a good C or Java...
  48. S

    What's the difference b/w artificial intelligence & machine learning?

    It seems that for a machine to learn, it must have intelligence. :confused:
  49. S

    Can a Perpetual Current Machine Actually Exist?

    If a magnet could somehow oscillate in and out of a coil of wire and used to power a light bulb, could that power the light bulb forever? I learned in class that running through a magnet through a coil of wire could produce an electric current. If we had two magnets powerful enough to repel...
  50. Femme_physics

    Machine parts, conic clutch two teachers, two different results

    Machine parts, conic clutch...two teachers, two different results! :( So a friend of mine who studies for the same test scanned me his teacher's solution to a problem they solved in class. We solved the same problem with a different teacher. I could really use your help to figure out who out of...
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