Bridge Definition and 473 Threads

How do you resolve an angled member supporting a vertical load into a column and cantalivered beam problem?

Homework Statement A uniform bridge 20 m long and weighing 4.00x10^5N is supported by two pillars located 3 m from each end. If a 1.96x10^4 N car is parked 8 m from one end of the brige, how much force does each pillar exert? Homework Equations (Fgb*L/2+Fgp*d)/L(sin theta). The...

I'm currently in my final year of high school, doing physics. We have been given an assingment about bridge structures. Basically, we build a bridge out of spaghetti, test it and discuss it. I'm thinking of things in which I can talk about. I've built an Arch Design Bridge. Mainly due to...

How will I calculate the forces involved in a truss and suspension bridge, my teacher did not explain this fully and I'm confused as hell.

Could anyone suggest what size and best type of bridge rectifier to use with this motor,Thrige Titan 10 HP, 7.5 KW,240V DC- 36.3 Amp,Excitation 150/300 V- 1.4/0.7 A. Also would I be able to run this motor off my house current of 240 V, This motor will be used to power a winch for pulling logs...

A Bridge Circuit Capacitor [Solved] EDIT: Problem has been solved. Homework Statement "The circuit has been connected as shown in the figure for a 'long' time. (See attached diagram) What is the magnitude of the electric potential across the capacitor? Answer in units of V."...

I am constructing a full-wave bridge with the following: - four D1N4148 - Function generator (50Hz with 10 Vpp) - 1k ohm resistor - Oscilloscope I've been trying to construct the circuit, but every time I did it I always get a half-wave instead of a full-wave. All the diodes are working...

I need a bit of help here. I have an upcoming assessment towards bridge design. The task is to create and construct a bridge made out of dried spaghetti sticks. The bridge is to be as light as possible while holding the most weight. I currently have 1 main design I'm leaning towards, but I'm...

I am having trouble finishing this problem. I am supposed to first derive an equation for V_5 in this circuit: http://img292.imageshack.us/img292/599/picture3qy2.png I applied a Delta-Wye transformation to get here: http://img292.imageshack.us/img292/9672/workot8.jpg From there I am...

Homework Statement In physics class, we are now starting to build free standing newspaper bridges. We are allowed to use only newspaper and glue, but we can use as much of those as possible, as long as it meets the following conditions: 1. It must be less than 254 g (don't ask me why)...

Homework Statement A bridge of length 60 m and mass 51800 kg is supported at each end. A truck of mass 45000 kg is located 26 m from the left end. Homework Equations What is the force on the bridge at the left point of support? The Attempt at a Solution I know your supposed to...

i'm using p type mosfets for an r/c cars h bridge controller (the two n types have been replaced with p types because of their lower internal resistance) and was wondering if there is a way to do it without voltage pump circuits that stills alllows a P.W.M. torque controller.

in a recent chemistry experiment at school, two voltaic (galvanic) cells were set up with the same solutions in either beaker (one being Copper Sulfate, and the other was another metal solution) anyway, one had a potassium nitrate salt bridge, the other a copper wire salt bridge... sooooooooooo...

I just got this project for my physics class. I need to build a paper bridge out of only paper and Elmer's glue. The bridge must be free standing with the highest point on the bridge being the roadbed (i was thinking i could do a suspension bridge, but I can't under that guideline). The...

How i can Establish wheatstone bridge principle by using kircchof's law?please tell me in details or send pdf or .doc files to:pavelavw@yahoo.com

how does it work?? i am really too confused and can't understand its idea. can anyone help??:confused: :confused:

Bond is standing on a bridge, 10 m above the road below, and his pursuers are getting too close for comfort. He spots an approaching flatbed truck loaded with mattresses and decides to jump from the bridge onto the truck to make his getaway. He notes that the telephone poles the truck is passing...

We have weekly problem sets that lead us through a "story" of sorts. In this week's, a group of tourists are on a newly-built, albeit poorly-designed bridge. The question reads: "The tourists bend their knees and, at the count of three, jump upward simultaneously. While their feet are in...

I'm working on a problem that has me confused. Perhaps someone might know of a resource with examples of different Wheatstone bridge circuits both balanced and unbalanced that use Thevenin's Theorem by eliminating different resistors from the bridge. The bridge I'm working with has one DC...

Hello, I'm trying to decide how I will provide excitation voltage to the wheatstone bridge of a load cell. The output of the load cell will be amplified by an LT1167 In-Amp. How concerned should I be about the precision/accuracy of the excitation voltage? Since the In-Amp will reject common...

This promises to be a rather difficult final round of voting. Good luck to everyone! 1. hypatia 2. Kurdt http://img329.imageshack.us/img329/219/tyne270904026ut8.jpg 3. hypnagogue http://img106.imageshack.us/img106/2142/bbridgeap8.jpg 4. turbo-1...

The second group of pictures for this contest. 1. SpaceElf http://img63.imageshack.us/img63/1809/bridge1fx6.jpg 2. turbo-1 http://img204.imageshack.us/img204/8899/wirebridgeos4.jpg 3. FredGarvin http://img247.imageshack.us/img247/1117/brindge004smbe4.jpg 4. ZapperZ 5...

Heres the problem. A bridge span is 5m high and 20m long. Find the verticle force and the horizontal thrust on each of the piers P in terms of weight suspended from the center of the span. I really hope you can understand the geometry of the problem without the drawing(there was a drawing...

[SIZE="5"]Bridge Over Troubled Water This week's theme is all about bridges! It can be anything from the covered Bridges of Madison Country, to the hilarious Tacoma Narrows bridge. A bridge (or bridges) must be the main focus of your picture. [SIZE="4"]Contest Rules: 1. Any digital...

From NPR -http://www.npr.org/templates/story/story.php?storyId=5637737 To enter the contest to blow up the Woodrow Wilson Bridge - http://www.wilsonbridge.com/toughestcommute/index.html

Here's a little challenge: You need to build a bridge to fill a 40-cm gap. The bridge must be able to support 1kg for 10 seconds and flex no more than 2.5 cm. Your budget is $95 million. Materials given are 18-cm straws at $1m, 18-cm toothpicks at 18-cm each at $5m, 6-cm toothpicks at $20m...

Bridge Design... I have a design exam on friday and I need some tips on revising for a particular question. We designed a bridge from aluminium angle and strip and tested it under a load to see what it could withstand before failure. I have been told by my lecturer that the question will ask...

I was wondering about this when playing bridge with my friends. I understand, that one player can be dealt C^{13}_{52} different distributions of the cards. But how to calculate the probability, that all players will get the same cards?

It is illegal to drive a pig over London bridge and it is also illegal to set off a nuclear weapon in the city limits of LA.It is perfectly legal to shoot someone from Wales with a crossbow should they be found in the county of shropshire on the weekend. I'm generally pretty law abiding and I...

A truck carrying chickens is too heavy for a bridge that it needs to cross. The empty truck is within the weight limits; with the chickens it is overweight. It is suggested that if one could get the chickens to fly around in the truck by banging on the truck side, it would be safe to cross the...

Hey all, I've got a project that I have to do. I have to make a bridge out of popsicle sticks. However, it's a competition and only the winner receives full credit. The bridge with the highest ratio of weight held to bridge weight wins. Weight Held (Pounds) ------------------------- =...

i remember in high school my physics teacher used the example of tacoma bridge to teach us resonance. what exactly is it that caused tacoma to collapse? how is forced resonanace different from normal resonance?

No 16 page 96: How long does it take for a car accelerating at 3.5 m/s^2 to go from rest to 120 km/h . Hint: first, change the velocity from km/h to m/s. No. 17 pag. 105: A rock is dropped from a bridge to the water below. It takes 2.4s to hit the water. find: a) the...

Please tell me if my reasoning is correct. a juggler carrying three balls wants to walk across a bridge that can only support the weight of the juggler and two balls. in order to make one trip, the juggler decides to juggle the three balls while walking across the bridge. that way, the...

Sorry that I had to use an image file, I was having a lot of trouble using the Latex system. http://www.flamingice.5gigs.com/Question.gif Ok... We know the amplitude of the oscillations, and the force per person, so all we need to do is find Fmax, by finding other values and substituting...

A hiker, who weighs 696 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4440 N, and rests on two concrete supports, one on each end. He stops 1/4 of the way along the bridge. What is the magnitude of the force that a concrete support exerts...

Question Sir Lancelot rides slowly out of the castle at Camelot and onto the 12.0-m-long drawbridge that passes over the moat. Unbeknownst to him, his enemies have partially severed the vertical cable holding up the front end of the bridge so that it will break under a tension of 5.80 \times...

Who can tell me the theory about the LCR bridge to measure capacitance?

hey, the rules are as follows: 70cm long 200g heavy use anything to keep it together my preference: holds about 10-15 kgs (it can be done) spaghetti doesn't stretch or bend, cause it snaps, my dad thought of tube spaghetti (bucatini), one in the centre, and five round the outside...

hey, the rules are as follows: 70cm long 200g heavy use anything to keep it together my preference: holds about 10-15 kgs (it can be done) spaghetti doesn't stretch or bend, cause it snaps, my dad thought of tube spaghetti (bucatini), one in the centre, and five round the outside...

Lately I have seen a number of spider webs [really, it looks like a single strand] running horizontally from one tree to the next. This morning I saw one over fifteen feet long, nearly perfectly level, and suspended abouty eight feet above the ground. How does a spider span the fifteen feet from...

Can I amuse anybody with a bridge puzzle? I made it some 25 years ago and it took almost a year to debug it. So if you find the solution within minutes then that’s either brilliant or you found one of the two build-in traps. The real solution looks unusual. South plays six No Trump, west...

i am, thus, attempting to understand the physics of the collapse of the Tacoma Narrows. can please explain what i have found to be the cause of the final distruction: single-degree-of-freedom torsional flutter? or if you know anything else about this event, please explain!

Help! Full Wave Bridge AGAIN! https://www.physicsforums.com/showthread.php?t=66883 I posted this in the Homework help zone and nobody helped me :cry: Please can someone here help me! I would appreciate it! Thanks!

Help! Full Wave Bridge! Hi guys! Okay - I know that this is a straight-forward intermediate level circuit theory problem but uh...I've forgotten how to do it so I need help! :confused: :confused: :confused: :confused: :confused: I have a full-wave rectifying bridge connected to a...

For our balsa wood bridge, 1/8 in square, would a bridge that crosses catilever and arch styles together work well? The steel blocks attached to the test table are acting like abutments, so all of our forces can be directed to them, right?

Can anyone or does anyone know where I can get a good explanation of how to figure out how big an arch should be for a bridge? I am thinking of making one for our competition, and if I can't get that to work right, I will switch to a king post deisgn. Oh, and is it true balsa and other...

I changed my mind, I'm not fickle, th stethescope was all i could remember... Anyway, apparently the tacoma bridge collapse was due to the bridge 'vibrating', and obviously the supports couldn't hold it... If you know anything about how the sound part of physics fits into this your help...

I am having trouble with the following question: A bridge has a natural frequence of 10 Hz. If a support is placed one-third of the way along the bridge, what is the new resonant frequency? How should I start this problem?

the problem reads: a uniform bridge 20 m long and weighing 400,000 N is supported by two pillars located 3 m from each end. if a 19,600 N car is parked 8 m from one end of the bridge, hoe much force does each pilliar exert? i was thinking about using something like (W1)(d1) = (W2)(d2) that...