Machine Definition and 918 Threads

hi, why does a massive pulley cause different tensions in a length of cable? I've looked for answers but got only that "the pulley needs to be lifted". Couldn't really picture it. Some maths would be nice :smile: cheers!

Homework Statement My question is about a double atwood machine like this: http://farside.ph.utexas.edu/teaching/336k/Newton/img1915.png Now imagine that m1 = 5m, m2=2m, m3=3m My question is: why does the upper pulley rotate despite the fact that the masses on either side are...

If anyone could walk me through any of these or provide any help I'd appreciate it. Thanks I owe you one. Homework Statement Homework Equations The Attempt at a Solution

This may be a bit weird but please consider my idea.. Flying Machines like the aeroplane work on the principles of aerodynamic lift employing a special wing structure. What if I make an alteration to this design such that these "wings" are replaced by moveable "curved surfaces" like the...

Homework Statement The pulley in the diagram has a radius of 0.160 m and a moment of inertia 0.480 kg.m². The rope does not slip on the pulley rim. Use energy methods to calculate the speed of the 4.00 kg block just before it strikes the floor. Homework Equations The Attempt at a...

Homework Statement The two masses (m1 = 5.2 kg and m2 = 2.6 kg) in the Atwood's machine shown in The Figure are released from rest, with m1 at a height of 0.79 m above the floor. When m1 hits the ground its speed is 1.7 m/s. Assuming that the pulley is a uniform disk with a radius of 12 cm...

Homework Statement a 25% efficient machine performs external work of 200 J. what input work is required?..please answer,,is the answer is 800 J? Homework Equations The Attempt at a Solution 800 J

I have a microwave machine. I am questioning whether it has leakage or not. I am asking is there a way of measuring the leakage of microwave machine. What I have been doing was, I purchased oscilloscope, it is on the way. whenever I turned on the microwave machine, the following will be...

Homework Statement Atwood’s fall machine consists of two weight of mass m1 and m2 attached with a massless rope running around a spinning wheel of mass M and radius R without slipping. The spinning wheel is attached at its center and rotates around an axis through its center without friction...

Hello smart people, I am wondering if there is a process to convert a function to a Turing Machine. In other words, if I provide a list of input strings , and a corresponding output string for each input string, is there a way to find the minimum number of instructions to realize any function...

Homework Statement An Atwood machine has a mas of 2.50 Kg connected by a light string to a mass of 7.00 Kg over a pulley with a moment of inertia of 0.0652 kg m^2 and a radius of 11.3 cm. If the system is released from rest, what is the speed of the masses after they have moved 1.45 m? (Hint...

1. MRI (magnetic resonance imaging) is a medical technique that produces detailed "pictures" of the interior of the body. The patient is placed into a solenoid that is 40 cm in diameter and 1.0 m long. A 100 A current creates a 5.0 T magnetic field inside the solenoid. To carry such a large...

Homework Statement Homework Equations There aren't really any relevant equations. The Attempt at a Solution Ok so I just want to see if my idea for the state diagram seems ok, I'm going to give it in table form here but its the same info. F | Bk | A | B | C | D...

hello, One can wonder what is the relation between the title of this thread and the subject of quantum mechanics, well, i was reading in a book about quantum computation and information and it was talking about computer science in some chapter where it shows a basic understanding of Turing...

Ok fellow posters.. I am trying to compare two machine tools for economy of operation. machine tool 1 uses 32 Nl/m air at idle (not moving) under power and moving uses 70 Nl/m machine tool 2 uses 73.5 Nl/m air at idle (not moving) under power and moving uses 73.5 Nl/m under power uses 70...

Homework Statement Consider the Atwood's machine of Lecture 8. We wish to use this machine to measure our local acceleration of gravity with an accuracy of 5% [i.e. (Delta g)/g = 0.05]. To begin, suppose we let the mass m_1 fall through a distance L. 3.1 Find an expression for the...

Hello, Could someone please give me an explanation using the following equation? I work this evaporator machine but in the operations manual there is this equation below.I would like to further my knowledge. Equation for Evaporation Q = U x A x DT Q = Energy Transfer (W) U = Heat...

1. Types off commutator and their effect on current densit? [b.]2I want to ask how many types of commutators are there in a DC machine and what is their effect on current density..[\b] [b]3.i have been working on it for a long time and came to know tht there are two types Brushed...

Homework Statement The two masses(m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown below are released from rest, with m1 at a height of 0.75 m above the floor. When m1 hits the ground its speed is 1.8 m/s. Assuming that the pulley is a uniform disk with a radius of 12 cm, determine...

Homework Statement The stator of the magnetic circuit of the above figure has a coil of turns 200, which carries a current of 1A. The rotor has a radius of 30mm, a height of 30mm and an axial depth of 20mm. The material for the stator and rotor has infinite permeability. The air gap...

Homework Statement String that is equal in length to the string connecting the pulley is sometimes tied to the bottoms of the two masses, where it hangs suspended between them. Explain why this would reduce experimental errors. Homework Equations The Attempt at a Solution I'm...

Homework Statement ok here's the problem in a picture h t t p : / / i m g 1 9 2 . i m a g e s h a c k . u s / i m g 1 9 2 / 4 5 0 0 / c a p t u r e x x w . j p g Homework Equations Sigma F = ma Fg = mg The Attempt at a Solution ok I called the 4 kg block m3 and the 2 kg...

how does ultrasound machine detects the reflected wave? i have read a bit of information and unfortunately I am still unsure how they detect the wave. "The rapid shape changes, or vibrations, of the crystals produce sound waves that travel outward. Conversely, when sound or pressure waves...

Homework Statement A frictionless, massless pulley is attached to the ceiling, in a gravity field g = 9.81 m/s2. Mass Mb is greater than mass Ma. The tensions Tx,Ty, Tz, and the constant g are magnitudes. (Select a response for each statement.) Please look at this pic...

Homework Statement http://isites.harvard.edu/fs/docs/icb.topic725237.files/problemset3_2010.pdf (Problem 1) Homework Equations f=ma, string conservation The Attempt at a Solution I'm not really sure how to do this. I know that the t of the string on the left is equal to the two...

Hello, I want to express Non-Deterministic Turing Machine constraint with boolean expression. The constraint is: "Cells which aren’t being read remain the same at time t+1". lets say H[i,j] means the read/write head at time i at cell j and S[i,j,k] means the symbol k at time i in cell j so the...

Machine and compressor (how to solve this??) Okay all, my first post I am from Australia so not sure which unit you guys preferred in this forum. :smile: Got this project to swap our plant compressor to smaller unit. My compressor details: pressure: 7.5 Bar / 110 psi power: 30 KW / 40...

Hey everybody. I am starting this seemingly impossible and hard project of making a rube goldberg machine. Can anyone give me helpful tips and ideas on how to start it? and perhaps provide examples?

could anyone help me with cnc turning process, diagram of machine. it be better if you can give me manual book about it. i need to learn about cnc from introduction and part of that machine. I'm new in this course.

Homework Statement A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27cm and a frequency of 2.55Hz. How long does it take to travel 11.43cm? Homework Equations x=A*cos(w*t) w=2\pi*f w=2\pi/T T=1/f The Attempt at a Solution I can't...

Homework Statement http://imgur.com/a2fLm Homework Equations F = ma is it The Attempt at a Solution The problem I had is that it's attached to the floor all of a sudden. Never before have we had Atwood problems like this, and I can't find any online... I drew out the free body...

Hi friends, This is my first post here in this forum. hope to hear as well as contribute to this forum in whatever best possible ways I can. Here I am with my problem domain. peeling off the coconut husk from the coconut. especially when the coconut husk is totally dried up. This...

Homework Statement There are three pulleys in this system. The leftmost pulley is attached to ceiling. It has a string running through it with a mass of m attached. The rightmost pulley is also attached to the ceiling. It has the same string running through it with a mass of 3m attached. In...

forces question, a "pedagogical machine" Homework Statement All surfaces are frictionless. How much force must be applied to M1 in order to keep M3 from rising or falling? Picture: http://www.slideshare.net/brigittperalta/sol-maquina-pedagogica-1546585 Homework Equations F...

I know the basics about the interferometer and how this causes intereference patterns in a broadband spectrum to occur but I need to clarify a few things and I can't find the answer in any textbook: 1. The detector receives information on the intensity of radiation being received and I have...

Homework Statement Hi there sorry to keep bombarding you all with these stupid questions but I just can't picture it in my head. In a FTIR machine when the blackbody radiation source is split at the beam splitter and half the frequencies are retarded before making a resultant wave and passing...

atwood machine problem -- symbolically solving for mass? Homework Statement Symbolically solve the equation derived for the acceleration of the Atwood's machine in part 1, A-3 for the mass m in terms of M, g, and the acceleration, a. (No numbers.) This question is part of a lab, so of...

why transformer is a machine?

The time machine idea ! I see lot of discussion going on time machines. there are different theories but none of them seems to be bringing any results. what exactly we are lacking in terms of achieving this. I think we have fairly enough good technology available atleast at atomic level...

Hey, first off I want to say that I don't have much background with physics (that's the reason I don't know where to put this thread at, because I have no clue of what kind of physics this contains) even though I would love to. But anyways, I was thinking randomly the other day and I was...

I KNOW that this has been asked many times before so I will put it in a way that is not as similar as the rest. My true goal is a bit far fetched so I will just say that I would like to build a time machine. What my question is, which should I study the most, and mainly in college because I am a...

Homework Statement I have a double Atwood machine; on left side there is a heavy thing which weight 4m, on right side there is another circle (this circle which go around in atwood machine) and on left there is heavy thing which weight m, on right - mass which weight 3m. Now the 3m thing starts...

Hi all, I'm considering doing a masters in either signal processing or machine learning. I have a bachelor's in electrical and electronic engineering, and have a bit of experience (internships mostly) in both industry and research. I was wondering if there are a lot of career opportunities...

Homework Statement Block B with a mass of (.75kg) is on an inclined plane attatched by a pulley to Block A which has a mass of (1.5kg). The angle given is 40 degrees. The coefficient of friction of Block B on the ramp is .29. What is the acceleration? Homework Equations Fnet=m*a...

Homework Statement Two masses are suspended from a pulley of mass m supported by an axle (Atwood machine). What is the net torque acting on the pulley wheel in terms of T1 and T2? There is friction between pulley and rope. Ropes are massless and pulley can rotate without friction about its own...

Homework Statement (a) How many states does this system have? (b) How many rows will there be in a state transition table? (c) Provide the state transition table. (d) Draw a state diagram of the system. (e) Describe what the circuit does in words. Homework Equations The Attempt at a...

Homework Statement Can someone check my work? [...] Receiving DATA in binary. The string length of each word is unknown. You are told that each word, demarcated by SYNC signals, is a two's complement number. Your task is to develop a synchronous sequential machine which examines the...

A machine rotates at an angular velocity of 1.6rad/s. Its velocity is then increased to 6.2rad/s at an angular acceleration of 0.7rad/s2. (a) How many revolutions does it make during its acceleration? (b) How long does the acceleration take? Sorry I'm not quite sure as how to approach this...

Hi all, My Undergraduate thesis requires me to design an ice making machine by modifying existing machines. I will appreciate your ideas on how I should go about it. Thanks in Advance! :smile:

I want to tap a NPT (NPT-3/4) thread hole on a plate. And I found some related standards, these standards told me the detailed dimensions of the thread. My question is how to machine the NPT thread with a tap? How to control the parameter mentioned in the standards? thanks in advance!