Belt Definition and 219 Threads

Hi I recently received my bachelor degree in ME and now I am facing a dilemma for my masters. I originally wanted to go into MSE abroad, but because of VISA issues I won't be able to attend although I got admitted. I have 3 choices: Materials Engineering, Condensed Matter Physics and...

HiI would like to know, does the torque required to turn a pulley increases if you increase the tension? I have a system like this:pulley motor pulley car and a belt goes...

Hi : lets examine the following scenario 1. M --------- o where M is a mass, o is a pulley with it's outter radius r attached to a mass by the belt drive -------. frictionless. 2. M ---------O same setup but the radius is now bigger, R. I was reading...

I returned home yesterday from North Carolina and wanted to give an update via some pics. In the motel the evening before her test. https://imagizer.imageshack.us/v2/393x295q90/r/526/img0194hi.jpg Doing a little tune-up at the Masters dojo the morning before the test...

Hi, For a long time, it is always unclear for me to understand that there is a tension force acting in the slack side of a belt drive. Tension acting in the tight side is quite straight forward and hence no doubt! When I see a belt drive in motion, I always see the slack side kind of...

Ok. Say you have a belt drive system that is run by a motor at one end. You have a load F located somewhere in the middle of the belt and the belt does not deflect (it is rigid). How would I determine the torque required by the motor to move this load F? Thanks in advance!

http://www.washingtonpost.com/national/health-science/van-allen-probes-spy-third-band-of-radiation-before-it-disappears/2013/02/28/19c7a66c-81c9-11e2-b99e-6baf4ebe42df_story.html Found this interesting article.

hey ... i need help with this problem Grain density=700 kg/m^3 velocity of belt=1.3 m/sec tan(theta)=tan(30)=0.6 hight=5m wide of belt = 50cm find: 1- real Length 2- conveing wight look at pic http://hh7.an3m1.com/Sep/an3m1.com_13608577291.png My answer : 1- sin(30)= 5\L L= 10 * 2.5= 25m...

Hello, I'm building some equipment that has a drum driven by a timing belt. The drum is roughly 11.25" in diameter. The drive belt used is H pitch - 1/2" spacing between the teeth. For the gear teeth on the drum I'm using another belt of the same pitch, inverted and epoxied onto the drum. The...

hey >>>> i have tow Questions about conveyor design: What are the Variables influencing the design of conveyor ? all i know is : Angle of surcharge

what is the value for our solar constant?

Homework Statement I am pretty confused with how to go about answering this question: Calculate the maximum lenth of conveyor which can be used to avoid the belt failing from stress, for an installation carrying 140 t/h up a gradient of 10 degrees, if the belt width is 1.1m, the speed is 1.7...

Hello! I have a question about seat belt force. In a 55km/h collision maximum chest acceleration is 60 g, and if say torso weighs say 40kg, then max force should be 600 m/s^2 * 40kg, which equals a lot, but if you look at test data of seat belt force it is only 8KN which is strange, compared to...

Hi all, I'm having an online discussion and curious to know about the forces a 3-point seat belt has on a car. One guy is fitting this retractable belt to his car. The retractor and anchor mount at one bolt hole, the anchor is off centre, it attaches via a steel extension piece, the section...

Homework Statement Sand moves without slipping at 6.0m/s down a conveyer belt that is tilted 15°. The sand enters a pipe 3.0m below the end of the conveyer belt. What is the horizontal distance between the conveyer belt and the pipe? Not sure where to start.

Imagine you are getting dressed in the morning and fastening a belt around your waste. You pull on the loose end of the belt, developing tension T throughout the length of the belt. Using this information, how can you determine the amount of compression the belt is applying to your waste? I...

Homework Statement A belt drive pulley has a mean diameter of 300mm, an angle of contact of 180° and rotates at 920 rpm. Smaller belt tension is 50 N and coefficient of friction is 0.3 Neglect centrifugal Homework Equations V=piND The Attempt at a Solution pi*(920/60)*0.3=14.45 ms...

Hey all, I'm on summer break so my engineering brain is almost completely turned off. So I would not be surprised if I am making some kind of silly error. I'm trying to compare different methods of linear positioning for a CNC project. ------------------------- Part 1 OK, so here's the...

Hi all, was wondering could anyone give me a hand with this calculation. So basically I want to estimate the torque required to turn a conveyor belt. I have drawn a diagram of what it looks like. I know the weight of the objects on the belt and their respective friction coefficients. Also the...

I've done part a) and b) but I have no idea where to even begin with part c) on figuring out the loading on the idler!

Homework Statement What is the larmor radius of an electron in the inner van allen belt? This is for a General Astr class so I feel like I must be over complicating it. Electron Kinetic Energy in the inner VA belt: K≥30 [MeV] (much greater then its rest energy) VA Belt Radius: r~1.1-2.0...

As we all know, the nuclear stability graph strays away from the y=x line from mass no. = 20 onwards. Why is that?

I'll start it off with a nice idea I found in another forum: http://www.energyfromthorium.com/forum/viewtopic.php?f=51&t=3433 Solar panels on the roof to keep battery banks for instrumentation and valves charged. Lovely and relatively inexpensive, might avoid the need for bigger battery...

Homework Statement Sand is placed onto a horizontal conveyor belt. rate of sand placed = 0.5 kg s-1 velocity of conveyor belt = 2 m s-1 a) what is the power supplied by the system to keep the velocity constant? b) what is the rate of change of KE by the sand c) why is the answer in a and b...

The aerial view of Valles Marineras has a strangely familiar look to it. As a kid I would shoot BB's at all sort of fruit and mud and stuff. Sometimes I'd hit a rotten apple or tomatoe with a glancing shot that would rip open a gaping tear for a distance as the BB would enter, force material out...

Homework Statement find the minimum number of turns the rope should be wound around the cylinder to maintain equilibrium of the weights the coefficient of friction is 0.20 and the mass1= 80kg and mass2-2kg.

I am a hobbyist, and I am not too familiar on to how to run motors. Can someone help me design a simple circuit that drives a dc motor on pulley drive of a conveyor belt. The conveyor belt has to stay on for 5 seconds after a switch is turned on. The belt is about 48 inches long, the radius of...

At a distance of 2-4 AUs, (in the asteroid belt), would you be able to stare directly at the sun? What about the rest of the view from this distance? Other planets, if at all visible, would just be tiny specks, like they are when viewed from earth? Would Jupiter appear larger by any noticeable...

Hi guys, I am working on a simple belt and pulley question, as pictured below. To find the magnitude, I used the following equation: (g(M-m))/(M+m) So, 9.81(2500-600)/(2500+600) = 6.01 - Answer = 6kN Is this correct, or am I doing it totally wrong? I have searched for the...

A car moving at 20 m/s runs into a piston that compresses air in a cylinder and stops the car at 0.3m. The 70kg person stops in the same distance because of the seat belt. Determine the average force of the seat belt on person during the stop and what assumptions did you make? ~we just...

Interferometrics Cart Imagine that a cart is mounted with two electric motors, connected each to a pulley. Between the pulleys is installed a belt of equidistant holes that always coincide at the same points in relation to the cart. This allows the passage of luminous flux. Like a...

I've seen inner and outer Van Allen belt drawings that have the inner belt consisting of protons and the outer belt consisting of electrons. I am guessing this is due to differences in the mass density or the charge density differences of the two. So we have charge separation in the Van...

Homework Statement Hi can anyone help me calculate the coefficient of friction between crates and a conveyor belt. The crate is moving up a 25O angle at a constant speed to a height of 12m. Homework Equations CoF=F/R The Attempt at a Solution I don't know if this is a trick...

I'm trying to find how much iron (by mass) is in the main asteroid belt. I'm finding a lot of sites that say 10% of the asteroids are M class, but is that by number or by mass? Does anyone know, and can you provide a reference?

Consider a very long conveyor belt from Earth to Mars. If we turned on the conveyor belt from Earth, would its opposing end instantly move on Mars? Or would the timing be slowed somehow from relativity? Thanks

Homework Statement http://imageshack.us/m/135/2262/beltz.jpg I do no understand as shown in the above picture why T1 = 1 to make e^u0 = e^-u0, could anyone offer an explanation as to why this is the case? Thanks Homework Equations All above The Attempt at a Solution

I need to study the measurement of population size of density. However, I can't find information on this that is understandable. Has anyone got any ideas? The Attempt at a Solution I already know they consist of a line with black marks to indicate something

I'm doing a project for physics involving crashing cars into walls and recording the forces generated... I've heard that a seat belt actually causes most deaths in the instance of a crash... is this true? Thanks, "Practice is necessary to improve an athlete’s performance without it, the...

sand is pouring on a conveyor belt in a rate of rate of dm/dt kgs-1 if the velocity of the conveyor belt is v ms-1, what is the power needed to run the conveyor belt. My friend arrived at his answer in this way F = dp/dt = d(mv)/dt = v (dm/dt) N Power = Fv = (dm/dt)v2 Watts...

I am choosing a timing belt for a 60kw continuous system at roughly 1100rpm. This is a relatively low speed application. After using the belt selection programs written by Gates, Emerson and Goodyear, they all seem to point towards quite hefty installations with large pulley diameters and...

Just a short question. As part of a dyno project, I am coupling two dc motors together with a timing belt. To allow the same rig to be used for different test motors, I am considering mounting this (test) motor on a table, which can be positioned in two directions on leadscrews. This would...

Just looking for a place to start, not all the work. Homework Statement 3 The asteroid belt between Mars and Jupiter consists of many fragments (which some space scientists think came from a planet that once orbited the Sun but was destroyed). (a) If the radius of the asteroid belt (where...

Mechanic of Machine -- belt drive system Homework Statement An induction motor shaft, runnnig at 1200 rpm, drives a workshop main shaft by a flat belt drive. the diamter of the pulley on the motor shaft is 40cm n the main shaft is 70cm. another pully of diameter 45cm drives a countershaft...

Hello all! I am usually lurking and posting around the EE side of physics forums, but I have a project that deals with a little bit of mechanical stuff (please move this thread if I'm in the wrong place), and the mechanical aspect of engineering certainly isn't my forte. To be as superficial...

How do scientists ensure that probes traveling beyond Mars avoid the asteroid belt? How are calculations made regarding the probe's journey through the asteroid belt to ensure that they are not hit by one?!

Hi board, I've just been reading up on the basics of meteorology, and http://en.wikipedia.org/wiki/Atmospheric_circulation" this claim: Unfortunately, no further information or references are provided, and the only google hits for "third desert belt" point right back to the article. I...

I have looked around several internet Physics sites and information sources, and even asked questions here and in other places, and can't seem to find answers to my questions about a thought experiment I came up with: Think about three similar cases: A ball, a solid cylinder, and a hollow...

Well I know I need to plot Mohr's circle for this, but what are the things i need to do before reaching that stage.here is the question: A 250mm diameter pulley is mounted on a 50mm diameter shaft at a distance of 200mm from a ball bearing. If the belt tension ratio is 3 to 1 determine the...

This is a possible problem that I can have on my quiz. There is ball on a conveyor belt. The belt is moving to the right, and a circular motor is running the belt. The belt starts of straight then starts to bend where the circular motor is. The circular motor is just at where the bend occurs...

Hello All I am trying to work through a belt drive design and I am confused with a simple concept. I have a two stage system that has a max torque input of 110N. I want to treat this as "worst case", so I assume that all of the torque is used at the final output flywheel. The first...