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. thunderstrike33

    Writing Vector Loops and Geometric Constraints for a Mechanism with a P1 Joint

    How would you write the vector loops and geometric constraints for this mechanism?
  2. Vitani11

    Velocity of masses on an atwood machine?

    Homework Statement 2 masses m1 and m2 are attached by a string to a massless pulley. mass 1 is on the surface while mass 2 is hanging off. mass 1 experiences a friction force (mu)k. What is the acceleration of the system? What is the velocity of mass 1 in terms of mass 2? Homework Equations...
  3. evinda

    MHB Designing a Deterministic Finite Automaton for Binary Input and Output Sequences

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  4. L

    Operating a portable ultrasound machine in -30 degrees C

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  5. OS_Dad

    Salvaged Washing Machine Motor to Power Chicken Plucker

    Hi Folks, I came across this knowledgeable site through Google. What I am trying to do is use a salvaged Whirlpool 2 speed washing machine motor to power a chicken plucker I an making. The original switch crapped out on me and I am now trying to wire the motor directly to a simple on/off...
  6. R

    Atwood Machine: Find M in Terms of m1 & m2

    Homework Statement In the Atwood’s machine, what should M be, in terms of m1 and m2, so that it doesn’t move? Homework Equations F=ma The Attempt at a Solution I've set T1=Mg as T1 is the tension of the rope attached to M. m1 and m2 are both connected together by the same rope so I assumed...
  7. Turkus2

    Effective Friction Related to Pulley Radius (Atwood Machine)

    First time posting on the forum - I've been coming here a lot the past year or so to seek answers. This one is concerning a lab. I think I've already done the legwork but am sort of looking for either something I'm missing or a confirmation of sorts. It's pretty messy and wordsy but if you...
  8. B

    I Intuitive Explanation of an Atwood Machine

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  9. D

    Problem with friction on weighing machine

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  10. L

    Atwood's machine with two connected discs

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  11. RonL

    Can Hydraulic Pressure Convert into Kinetic Energy?

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  12. Bray__

    What Are the Accelerations and Tensions in a Double Atwood's Machine System?

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  13. Divya Shyam Singh

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  14. B

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  15. ramzerimar

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  16. cnh1995

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  17. M

    MHB Designing a Non-deterministic 2-Tape Turing Machine for a Specific Language

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  18. AaronK

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  19. M

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  20. N

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  21. J

    Force calculation for opening guard on machine

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  22. B

    I Glycol Fog Machine: Is Pipe Pipe Reconstitution Possible?

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  23. Soumalya

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  24. AndresPB

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  25. J

    I William skinner Machine gravity

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  26. A

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  27. P

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  28. E

    I Simple machine classification (can o worms?)

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  29. A

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  30. Stefen

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  31. PenguinCo

    What simple machine is a cam/eccentric?

    Now I know that levers, wheels, screws, inclined planes, wedges, and pulleys (which I believe are actually levers in disguise), are the classical simple machines from way back when. Although I can classify things into these categories, I'm having trouble determining which of them a cam/eccentric...
  32. calikazam

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  33. AndresPB

    Medical What are the Technical Specifications for the KL27-0.8-70 X-Ray Machine?

    Good afternoon, I'm doing a research on x-rays machines. I chose the model KL27-0.8-70 (or any oral x-ray machine). I would be very grateful if someone could provide me some technical information as the radiation pattern, the aceleration efectuated on the electrons, and the electric field...
  34. B

    Work Done by Theme Park Machine on Rider

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  35. fluidistic

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  36. S

    Double pulley Atwood machine (with 3 masses)

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  37. firefox

    Negative Moment of Inertia from Atwood Machine Experiment?

    I'm currently completing an Atwood Machine Experiment with two 100g weights on either side of the pulley, with a variance in weight created by attaching dimes and pennies to either side of the weights. The point of the experiment is to validate: (m1 – m2)g = (m1 + m2 + I/R2) Homework Statement...
  38. L

    Is Osmosis a Phenomenon of Thermodynamics?

    I have read that osmosis " works like a machine ". It lifts weight ( this is obvious ) on the expense of thermal energy. Does anyone has any thoughts about how it consumes thermal energy? Thank you in advance.
  39. Docscientist

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    Hello brothers and sisters of different countries, We all know our foods are not without chemicals and other substances that are harmful for our health.We know the major cause is because most of the people in various countries do not have access to knowing what a food item contains and how...
  40. M

    Detecting Washing Machine Drum Out Of Balance Limits

    I am a noobie and I am not really sure this is the right forum to post to, so please excuse me if I am posting in the wrong place. I had considered General Physics and Classical Physics, but I hope I have made my best choice and I don't think it is acceptable to post in more than one forum...
  41. SherLOCKed

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    Which will be my reference frame while modelling and control - the reference machine in the network or the network bus itself?And if so how do i relate the dfig to this reference frame?
  42. Zlelik

    Is Hydroelectric power plant a perpetual motion machine?

    Is Hydroelectric power plant a perpetual motion machine of second kind from this classification https://en.wikipedia.org/wiki/Perpetual_motion#Classification ? or not? If not which kind of perpetual motion machine is it? :)
  43. T

    Machine elements stress concentration

    Homework Statement A flat part with constant thickness b is loaded in tension as shown. The height changes from 50 to 87 mm with a radius r = 4.0 mm. Find how much lower a load can be transmitted through the bar if the height increases from 50 to 100 mm and the radius increases from 4.0 to 10...
  44. K

    How Do You Calculate the Second Mass in an Atwood Machine Problem?

    Homework Statement atwood machine: pulley with negligible mass and frictionless with 2 blocks hanging at rest. The first block "m" has a mass of 3.66kg The second Block "M" is unknown The blocks are released; block M accelerates at .255*g m/s2 downward Find the mass of block "M" Hint: There...
  45. siansoft

    Designing a Pneumatic Filling Machine

    Hi All I'm designing a pneumatic filling machine and I'm looking for this parts in the photo attached so please can anyone knows where can i found it? Thank You
  46. T

    Machine elements - deflection and stress problem

    Homework Statement Homework Equations δ = Pl/AE σ = P/A The Attempt at a Solution I had calculated the deformation for both the steel and aluminum, and added them together to give me δ = 0.481 mm, which is incorrect. I also thought I could simply plug in the force P = 200kN and the...
  47. J

    Atwood Machine Lab Homework: Solve for Moment of Inertia

    Homework Statement I am given the equation (m1 – m2)g = (m1 + m2 + I/R2)a and the experiment is to validate this equation. Homework Equations The Attempt at a Solution After following the lab guide, it tells you to plot the weight difference (m1– m2)g against acceleration and determine...
  48. S

    Efficiency of a synchronous machine.

    Homework Statement The armature resistance per phase is given as 24.7ohms. Delta configured machine. Open circuit voltage is 220v, short circuit current is 1.1A at 3000rpm. Rpm is dropped to 1500rpm and no load line voltage is 100. Find power and efficiency if an inductive load of 1.4H is...
  49. N

    Function Machines: 6-12, 8-20 | Free Homework Help

    Homework Statement There are two possible functions machines which will give the answers below: 6 --> ? then ? --> 12 8 --> ? then ? --> 20 Homework Equations [/B] I have managed to find the first which is x4 and then - 12 so: 6 --> x4 then -12 --> 12 8 --> x4 then -12 --> 20 works! The...
  50. S

    How Do You Solve a Double Atwood's Machine Problem?

    Homework Statement Masses m1 and m2 are connected by a light during A over a light frictionless pulley B. The axel of pulley B is connected by a light string C over a second light frictionless pulley D to a mass m3. Pulley D is attached o the ceiling. The system is released from rest. In terms...
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