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. I

    Build a Shive Wave Machine - Project 102

    Hello everyone, I am taking a course called project 102 which based on doing projects and it its mandatory if you want to study engineering. Even though I want to study Manufacturing Enginnering all projects related to it was taken so i was left with this "Build your shive wave machine"...
  2. F

    Grass Trimmer machine ( Portable)

    Hi everyone, is it possible to build a grass cutter that can cut grass and vacuum it at the same time?
  3. N

    Turing machine depth-first search algorithm

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  4. U

    Lagrangian equation for 5 pulley Atwood Machine.

    Homework Statement Consider the Atwood’s pulley shown below. The masses are 4m, 3m, and m. Let x and y be the directed distances from the centers of the fixed (i.e. inertial) top pulleys for the left and right masses as indicated. http://imgur.com/VXEygxt a) Write down the Lagrangian...
  5. M

    Designing Moore Machine: Tips & Troubleshooting

    Hopefully this post isn't too long, I am going to try to give you as much relevant information as possible so you can answer this easily. For a class project, I am required to design a Moore Machine based on a problem that we were given. I have already done this with a Mealy Machine, but I am...
  6. P

    Why is it bad to put metal in an MRI machine?

    I saw a House episode where a person had internal bleeding because they had metal inside their body and they went into an MRI machine. I'm learning about NMR now and I want to try and understand it more.
  7. J

    Pulley System Problem with String Impulse (Atwood's Machine)

    Homework Statement Two particles of masses 8 kg and 5 kg are connected to the two ends of a light inextensible string which passes over a fixed smooth pulley. Initially each of the two particles are held at a position which is 5 m above a horizontal ground. The objects are then released from...
  8. R

    Wondering if a machine could be said to be 100% efficient

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  9. A

    Force of a nail inside an MRI machine

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  10. R

    Washing machine drain pump motor type

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  11. M

    Turing machine problem to getting startet

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  12. K

    What is the TSS Engine and how can it enhance space-related learning?

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  13. W

    Linking a HP50g to a Windows 8 machine

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  14. S

    Creating an Anti-Matter Machine at Home

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  15. D

    Atwood's Machine, massive pulley and upwards force acting upon it.

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  16. J

    Why Does the Atwood Machine Calculation Yield the Same Tension on Both Sides?

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  17. lisab

    Alternatives To The Wayback Machine?

    Right upfront: I'm a noob at this. How can I find a Craigslist ad that has expired? I tried the Wayback machine, it didn't have it in the archives. Any ideas?
  18. Femme_physics

    Machine Parts - Screws fastening a board calculation

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  19. E

    Dixie Cup dispensers. How does this machine work?

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  20. I

    Differences b/w Machine Accuracy, Smallest Representable & Norm. Numbers

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  21. I

    Time Traveling: Can We Go Back in Time?

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  22. Femme_physics

    Machine Parts - Relating technical mechanics to the mechanics

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  23. K

    Conflict: why synchronous machine doesn't produce induced EMF in the DC field wires

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  24. PhizKid

    Pedagogical machine acceleration when force is 0

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  25. PhizKid

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  26. P

    Can a Linear-Coil Spring Improve the Accuracy of a Weighing Machine?

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  27. B

    Fresh Water Generation/Desalinization Machine? Any Ideas?

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  28. N

    Need calculus and several books as a prerequisite for Machine Learning

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  29. C

    Atwood's Machine with one side holding a variable mass

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  30. D

    Moment of inertia and Atwood Machine

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  31. J

    Fortran What Should Be the Values of Ax and Ay in This Fortran 90 Code?

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  32. S

    Air gap flux density in DC machine

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  33. H

    Is Lucid Dreaming the Key to Unlocking Quantum Machine Learning?

    Hi, call me Heilsin. Lately, I've been reaching down into the bowels of lucid dreaming, and astral projection. Every night, I've been keeping logs of my dreams, and what they could possibly mean. My latest dream uncovered a very intricate machine. It used the basic principles of Quantum...
  34. C

    Archived Atwood Machine, I determining position of the masses.

    Homework Statement I know how to do this type of problem, I'm just confused as to how to determine the distance the (4m) mass goes up . Homework Equations N/A The Attempt at a Solution So I was thinking that if mass (5m) and mass (3m) go in opposite directions then mass (4m)...
  35. S

    Why poles of machine are always even?

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  36. J

    Computational Physics Machine Problem

    We need to think of a machine problem which we are going to simulate and solve using fortran programming. Can someone please give me an idea on what machine problem to do? Something easy please coz I don't really have much idea about programming. I only know the basics. Thanks :)
  37. K

    Simple harmonic motion of a machine part

    Homework Statement A machine part is undergoing SHM with a frequency of of 5hz and amplitude of 1.80cm. How long does it take the part to go from x = 0 to -1.80cm? Homework Equations x = Acoswt The Attempt at a Solution X is given and convert it to metres 0.018. I need to...
  38. S

    Alcubierre warp drive as time machine.

    Hi. I heard it's possible to use an "Alcubierre warp drive" as a time machine, if they existed. But how, precisely, would that work?
  39. H

    Derivatives in an Atwood Machine

    Homework Statement I have the professor's solutions for a homework we handed in. There is a part that is confusing me. We have the following equation: $$E = \frac{1}{2}(m_1 + m_2)\dot{x}^2-(m_1-m_2)gx$$ Homework Equations We want to find: $$dE/dt = 0$$ The Attempt at a Solution...
  40. C

    Building a Time Machine: What You Need to Know

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  41. I

    Atwood's Machine: Calculating Velocity and Angular Velocity

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  42. D

    Determining Scale Readings on an Atwood Machine

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  43. C

    Feynman's reversible lifting machine analogy- help

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  44. K

    Atwood Machine: Energy & Work Homework Soln

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  45. H

    Extracting Sign, Exponent, and Mantissa from 64-bit Machine Number

    Homework Statement The problem asks us to write a MATLAB function that takes as input a vector 'v' representing a 64-bit machine number in double precision, and extract the sign (t), the exponent (c), and the mantissa (f). Homework Equations The Attempt at a Solution I'm extremely novice at...
  46. N

    Tattoo Machine Coils: The Science Behind the Magic

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  47. A

    Philosophical: Is the universe a type of Turing machine?

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  48. S

    Engineering DC Machine motor constant equation

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  49. A

    How can I design a linear generator for a wave energy converter?

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  50. J

    Help with an Atwood's Machine problem

    Homework Statement Consider the ideal Atwood's machine in Figure 4-65. When N washers are transferred from the left side to the right side, the right side descends 47.1cm in 0.40s. Find N.Homework Equations a = (m2-m1/m1+m2)g The Attempt at a Solution I'm honestly not sure where to start...
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