Trains Definition and 87 Threads

Two trains heading straight for each other on the same track are 850m apart when their engineers see each other and hit the brakes, giving both trains a constant deceleration (a). The Express is heading west at a speed of 15.0 m/s, while the east bound Flyer is traveling at a speed of 25 m/s...

Homework Statement The train travels from place A to place B for one hour. Forty minutes after the departure, first train meets with second train, which departed from place B ten minutes after first train, and it’s traveling with an average speed of 40 km / h. Homework Equations What...

Homework Statement Two trains face each other on adjacent tracks. They are initially at rest, and their front ends are 40m apart. The train on the left accelerates rightward at 1.12m/s2. The train on the right accelerates leftward at 1 m/s2. How far does the train on the left travel before...

I'm having trouble with this problem mostly because I can't think of the logic behind it, so I don't know which of the basic formulae to use. Excuse my "noobieness" as I'm a first-year physics student. The question states, "Two trains face each other on adjacent tracks. They are initially at...

Hey I'm in high school and I need help with this seemingly easy problem. I have 3 constant acceleration equations but I don't know how to use them in conjunction with this problem. A train leaves from Chicago toward Atl going 20 m/s. At the same time another train leaves from Atl going to...

Homework Statement A train of proper length L moves at speed v1 with respect to the ground. A passenger runs from the back of the train to the front at speed v2 with respect to the train. How much time does this take as viewed by some one on the ground? a) Find the relative speed of...

I really thought I could have found this on the search function but hey, here goes! Homework Statement Two trains, each having a speed of 26 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h flies off the front of one train when they are 66 km apart and...

Hey people, A little question. I know France has trains running from Paris to London England. I was wondering if anyone knew if that train uses some type of underground tunnel or if it uses a bridge and what the name of it is? I've tried looking for it but its a difficult subject to...

Homework Statement 2 trains approach each other on same track with equal speed of 20 m/s. When they are 2km apart, they see each other and deaccelerate. If deaccelerations are uniform, how large the acc. would be to avoid collision. Homework Equations v^{2} - v_{0}^{2} = 2ax The...

Three identical train cars, coupled together, are rolling east at 4 m/s. A fourth car traveling east at 6 m/s catches up with the three and couples to make a four-car train. What is the speed of the four-car train? I have no idea what to do. Please Help...thanks in advance :)

hi friends, can anyone gimme a link describing the aerodynamic effect of a moving train on its vicnity space. a study about how the air around it becomes when the train moves.

Homework Statement As two trains move along a track, their conductors suddenly notice that they are headed toward each other. Figure 2-27 http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c02/pict_2_27.gif gives their velocities v as functions of time t as the conductors slow the...

[b]1. two trains 200 meteres and 150 meters are running on the parallel rails at this rate of 40 km/hr and 45 km/hr.in how much time will they cross each other if they are running on the same direction Homework Equations [b]3. speed=distance/time train1 =200*40*5/18...

OK, I have an assessment task to create a 3D model of SOME of Einstein's thought experiments involving trains and mirrors, and present it to the class. Therefore a minimum of 2 thought experiments. The task is unique (ie each student is required to model a different part of the course), and I'm...

I'm interested in the superconductors they use to levitate trains. One of the most talked about high-temp-superconductors seems to be Ytriuum Barium Copper Oxide. I know this has a critical temperature of around 90-93K. Does anyone know any of its mechanical properties, such as Young's Modulus...

Problem statement The first thing that I notice, is that T = 2\pi\sqrt{\frac{R ^3}{g}} looks suspiciously like T = 2\pi\sqrt{\frac{\ell}{g}} And g_x=G\frac{M}{R^3}x looks suspiciously like: F = G \frac{m_1 m_2}{r^2} F=m_1 a_1 a_1= \frac {F}{m_1} a_1 = G \frac{m_2}{r^2} And other than that...

I believe this has just been tested (again) yesterday (Sept 17th/07) From: http://www.scenta.co.uk/scenta/news.cfm?cit_id=1217038&FAArea1=widgets.content_view_1&search_text1=&startrow1=16 The electric car just got a boost from the power generated by its own wind...! Article from JCNNetwork...

For phys 170 we do assignments on a website from the textbook edugen.wiley.com. Homework Statement A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 870 m apart, each engineer sees the other's...

I am developing a new transportation system using Industrial Design methology and need to know aerodynamic smoth shipping contatners and capsules moving in ihe form of a train would be (as described in my blog). How does the number of units in the train effect its...

using instantaneous vs. velocity/speed Two trains, each having a speed of 34 km/h, are headed at each other on the same track. A bird that can fly 58 km/h flies off the front of one train when they are 102 km apart and heads directly for the other train. On reaching the other train it flies...

So we're always told not to touch the third rail, as it's at a very high potential. Makes sense. But how does return current work in such a system? Let's say there is some load (the motor - we'll simplify and assume DC). One terminal of the motor is connected to the third rail, what's the...

A train on one track moves in the same direction as a second train on the adjacent track. The first train, which is ahead of the second train and moves with a speed of 28 m/s, blows a horn whose frequency is 125 Hz. If the frequency heard on the second train is 132 Hz, what is its speed? so...

Train X and Y arrive at a station at random between 8 am to 8.20 am trains stop 4 min assuming that the trains arrive independently. 1. Determine the probability the train X. 2. Determine the probability the train meet at the station. 3. Assuming that the trains meet; Determine the...

Another terrific set of pictures by everyone involved. Well done! This will be another tough contest to vote on. 1. GeoMike http://www.mcschell.com/cog.jpg 2. larkspur http://home.comcast.net/~larkspur2020/soaring.JPG 3. Janus...

ok so, i have a problem.. it says: two trains have the eame length L=150m, are traveling in a parallel itinerary. the first is going with 60 km/s, the second 90km/s. 1) the trains are going in the oppsite way. how much time is it going to take them to cross each other? 2) same question...

I'm sure there's already a thread about how else to solve the famous problem re: the distance covered by a bird flying between two trains on a collision course (other than adding up the sums, of course), but I can't find it. Can anyone give me a quick link? Thanks!

I have an exam on monday and looking through the past papers I came across a question I couldn't find a suitable answer to: List the economical advantages of using a transformer in a train rather than run the overhead lines at 400V? any help would be very much appreciated... Phil N

It may be that I'll leave New York alone and travel far far to other states. However I've never done such a thing. I mean, I always travel with my parents, and never by train or bus (except within NYC). So, do you know any websites out there, that let me play a tiny bit, and find the cheapest...

I guess my brain is fried, I can't figure out what formula to use for this problem: Two trains, one traveling at 72 km/h and the other at 133 km/h, are headed toward one another along a straight, level track. When they are 860 m apart, each engineer sees the other's train and applies the...

Two trains, each having a speed of 34 km/h, are headed at each other on the same track. A bird that can fly 58 km/h flies off the front of one train when they are 102 km apart and heads directly for the other train. On reaching the other train it flies directly back to the first train, and so...

Hi folks! I'm having my oral exam in physics here in Norway this tuesday. The theme for my exam is "tilting trains". Here is the translated assignement: [FONT=Courier New] What is a tilting train, and how does the physics behind the tilting work? Why is traveling with tilting trains...

Kinda confused on this one becuase of the time difference involved A train leaves a station going south at 60 km/hr at 10:00. Another train heading due west reaches this station at 11:00. The latter train was traveling at 45km/hr. At what time are they the closest? To start with the 45...

I am trying to help a friend through this problem train problem - 2 trains going oposite direction leaving from same station - train A going 120 km/hr (velocity) - train B going 20 km / hr / hr (acceler) Time when are they 500 km apar What i did was Trying to solve 500=...

Using Speical relativity, of course If two trains leave a station on the same track. An observer missed both these trains and is standing close to the track sees the westbound train recede at 0.6c and sees the eastbound train recede at 0.8c. There is a ticket collector on the westbound train...

Plz help me w/ this problem...thanks Two trains, each hav ing a speed of 30 km/h, are headed at each other on the same straight track. A bird that can fly 60km/h flies off the front of one train when they r 60km apart and heads directly for the other train. On reaching the other train it...

Why don't commuters trains have sleeping cabinets.. I could really use them :frown: ofcourse I would wake up somewhere in white russia.. but at least I'd get my sleep

Hello, this is the problem: Two trains, each having a speed of 30 km/hr, are headed at each other on the same straight track. A bird that can fly 60 km/hr flies off the front of one train when they are 60 km apart and heads directly back for the other train. On reaching the other train it...