Train Definition and 638 Threads

Homework Statement A fugitive tries to hop on a freight train traveling at a constant speed of 6.0m/s. The fugitive starts from rest and accelerates at 4.0m/s^2 to his maximum speed of 8.0 m/s. How long does it take him to catch the train? What is the distance traveled to catch the train...

I try my best to solve this problem but couldn't ...here is the question 1.the train starting rest leaves a station with a constant acceleration.at the end of 5.34 s,it is moving at 15.549m/s. what is the train displacement in the first 3.15 s of motion?answer in units of meter. I try in...

Homework Statement A light-rail train going from one station to the next on a straight section of track accelerates from rest at 2.27 m/s2 for 15.7 s/ It then proceeds at constant speed for 1346 m before slowing down at 2.2 m/s2 until it stops at the station. What is the distance between the...

Hi, I was wondering if i could gt anyhelp with some research i was doing? I'm looking at the Maglev train systems used in Japan, and some of the developing ideas in the USA and Germany. What i was wondering is if anybody would be able to help me compile a list of all the physics concepts...

As a train accelerates away from a station, it reaches a speed of 4.6 m/s in 5.2 s. If the train's acceleration remains constant, what is its speed after an additional 6.0s has elapsed? I know I should be able to do this,but nothing I try works.If anyone could just point me the right way...

Homework Statement (a) If the maximum acceleration that is tolerable for passengers in a subway train is 1.54 m/s2 and subway stations are located 816 m apart, what is the maximum speed a subway train can attain between stations? (b) What is the travel time between stations? (c) If a subway...

Homework Statement A train moves past a tower at a speed of 0.78c. The train has a rest length of L' = 450m. When the front of the train passes the tower, the clocks in the tower and in the front of the train are synchronized to t=t'=0s. The instant that the back of the train passes the...

An isotropic point source of neutrons emits 10E8 fast neutrons per second. It is 3m horizontally away from a train track. A train goes by at 60 miles per hour. Ignoring scattering and attenuation, what is the fluence (i.e. neutrons per meter square) of neutrons that would strike a pasenger at...

Maybe the US government has a "no-bad-news-allowed" policy just like the Enron execs had. Or maybe the Bush government is leaving a huge fiscal train wreck (I think that's actually a technical term) for the next president on purpose. I think everyone knows how partisan they are. Check it out...

I want know that can we build a long Permanent magnet for a Maglev way ? Please say that its possible ? (i attached one picture , with that you can understand that what is my question and what is a long Maglev way by a Permanent magnet)

Homework Statement A train leaves the station at 10:00 and travels due south at a speed of 60 km/h. Another train has been heading due west at 45 km/h and reaches the same station at 11:00. At what time were the two trains closest together? Homework Equations c^{2}=a^{2}+b^{2}The Attempt at a...

Homework Statement A subway train rounds an unbanked curve at 67 km/h. An unused strap makes an angle of 15 degrees to the vertical. What is the radius of the turn. The book answer is 132 m. Homework Equations F = ma = mv^2/r The Attempt at a Solution A...

There's one of the paradoxes with SR that I've never actually seen an answer for. There is a man on a train traveling at a velocity where length contraction starts to matter. Say, .3c. There are some dirty bandits that have rigged up a trap door system in a mountain up ahead on the tracks...

Homework Statement Suppose the two lightning bolts shown in the figure 37.5a in the txtbook are simultaneous to an observer on the train. Show that they are not simultaneous to an observer on the ground. (Relevant Diagram Attached) Homework Equations The Attempt at a Solution...

Homework Statement I need help finding the exponential Fourier series for the pulse train below. http://img329.imageshack.us/img329/1184/20080427091409ev5.jpg Homework Equations p_T(t)=\sum_{n=-\infty}^{\infty}{D_n e^{j2nt} D_n=\frac{1}{T_0}\int_{T_0}^{}{x(t)e^{-j2nt}dt}The Attempt at a...

Hi. I am learning special relativity and have decided to take Einstein's train example to practice some calculations. I have given the train speed v=1/4c and have decided on distances that make the side observer's space and time calculations straightforward. I have calculated everything using...

Homework Statement A train whistle sounds. As the train approaches, a stationary observer near the track hears the whistle at a frequency of 500 hertz. As the train recedes the observer hears the whistle at a frequency of 450 hertz. what is the speed of the train? v (sound) = 343 m/s...

1.A passenger train is traveling at 25m/s around a circular curve of 1000 m radius. if the maximum total acceleration is not to exceed g/10, determine the maximum rate at which the speed may be decreased. Take g = 9.81 m/s^2. Answer is 0.756 m/s^2, but what steps do i take to find the answer?

If a train is traveling 100mph in one direction and a fly is traveling 5mph the opposite, and the fly hits the train what speed is the fly traveling at the point of impact?

1. The figure below shows the drive train of a bicycle that has wheels 67.3 cm in diameter and pedal cranks 17.5 cm long. The cyclist pedals at a steady angular rate of 76.5 rev/min. The chain engages with a front sprocket 15.2 cm in diameter and a rear sprocket 7.25 cm in diameter. 2. v...

i'm having a LOT of trouble understanding pulse train response in RL and CR circuits... could someone please recommend a good reading over the internet... i understand LR and RC response fairly better... and use the snapshot idea to get voltage equations etc... but its very confusing and i...

A subway train starts from rest at a station and accelerates at a rate of 1.60m/s2 for 14.0s. It runs at a constant speed for 70.0s and slows down at a rate of 3.50m/s2 until it stops at the next station. Find the total distance covered. I have no idea what to do for this problem.

Hi ! can anyone help me ? A train locomotive is pulling two cars of the same mass behind it. Show that the tension in the coupling between the locomotive and the first car is twice that between the first car and the second car, for any nonzero accelerationv of the train . thanks

this questions has been bugging me for a long time now: Imagine you are in a train, in a compartment, sitting there. Then suddenly you see outside of the window a bird that flies exactly at the speed of the train. It gets closer and closer, until it flies into the compartment through an open...

i have no idea at all how to do these. someone help please 1. On a hot summer afternoon, Keith and Nate are out fishing in their rowboat when they decide to jump into the water and go for a swim. Keith, whose mass is 65.0 kg, jumps straight off the front of the boat with a speed of 2.00 m\s...

Homework Statement A deisel train accelerates uniformly from rest to reach 60km/hr in 6 minutes, after which the speed remains constant. Calculate the total time taken to travel 6km and the acceleration. Homework Equations s= ut v= u+at s=ut + 0.5*at^2 The Attempt at a Solution I'm not sure...

suppose i am moving in a train and at the same time playing a violin .Is the dopller effect/formulae applicable for me

Homework Statement What speed must a 15 metric ton train travel to have a momentum of 700,000 kg(m/s)? Homework Equations Momentum = mass X velocity change in momentum = mass(Finalvelocity - initialvelocity) The Attempt at a Solution I though you did it like this... 15...

A high speed train is traveling at a speed of 41 m/s when the engineer sounds the 416 Hz warning horn. The speed of sound is 345 m/s. What is the frequency of the sound as perceived by a person standing on at the crossing when the train is leaving? I used the equation: f0=fs/(1-vs/v) f0=416...

Homework Statement A person is standing on top floor anywhere along a measuring tape that runs from point A to point B. There is a train on the ground level directly below that floor. The distance between the top floor and the level of the train is 4.95 m. Train is going from Photogate A (a...

why we do not observe any “lack of simultaneity” when we substitute sound signals for the light flashes in the “thought experiment” with a train moving past a platform (Einstein's lightning strike-train "thought experiment")? this has troubled me for 5hours now. i don't know whether it is too...

A 10,500kg railroad car travels alone on a level, frictionless track with a constant speed of 15.0 m/s. An additional 5,000kg load is dropped from a tower onto the car. What will then be its new speed? 2. Homework Equations Momentum of conservation: m1i+m2i=(m1+m2)vf 3. The...

Homework Statement When 2.66 grams of a compound containing only carbon, hydrogen, and oxygen is burned completely, 4.50 grams of CO2 and 1.10 grams of H2O are produced. What is the empirical formula of the compound? Answer Options: C5H6O4 C5H6O5 C5H12O5 C4H6O3 C4H8O3 C3H4O3 C4H4O5...

Homework Statement A train is moving eastward at 60.0mi/hr. A waiter is walking westward at 2.0mi/hr. A fly is crawling north across the waiter at 3.0mi/hr. What is the velocity of the fly relative to the tracks? The Attempt at a Solution I don't understand what it means by the fly...

I need some physics experts to help settle a debate between me and a coworker. Would it be possible for a large enough puddle to derail a passenger train? Obviously if you tried to drive a train through a lake it would derail, but could there ever be enough water from heavy rainfall to do the...

Homework Statement A 8000 kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs as illustrated in the figure below. Both springs are described by Hooke's law with k1 = 1600 N/m and k2 = 3000 N/m. After the first spring...

Homework Statement Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60m long. The first moves past her in 1.50 s and the second in 1.10 s. Find the constant acceleration of the train. Homework Equations...

the setting: A train travels at high speed. A runner on the train sprints towards the back of the train with the same speed (wrt to the train). as the train moves forward (wrt the earth). therefore the runner doesn't move wrt to earh. The paradox: the runner's clock runs slower than compared...

if a man is standing on a point "A" inside a train moving at a very high speed then he jumped . will he land on the same point A?

1. Homework Statement A train is moving parallel and adjacent to a highway with a constant speed of 33 m/s. Initially a car is 32 m behind the train, traveling in the same direction as the train at 47 m/s and accelerating at 4 m/s^2. What is the speed of the car just as it passes the train...

Homework Statement Two trains, one traveling at 74.00 km/h and the other at 148.00 km/h, are headed toward one another along a straight, level track. When they are 938 m apart, each engineer sees the other's train and applies the brakes. The brakes decelerate each train at the rate of 1.0...

Hi. I would really appreciate it if someone could please help me with the following M1 level kinematics question as I am really stuck. The brakes of a train can produce a retardation of 1.7 m/s^2. If the train is traveling at 100 km/h and applies its brakes what distance does it travel...

Homework Statement A 2.7 kg toy locomotive is pulling a 1.2 kg caboose. The frictional force of the track on the caboose is 0.48 N backward along the track. If the train is accelerating forward at 2.7 m/s2, what is the magnitude of the force exerted by the locomotive on the caboose...

Ok so the problem: 2 trains are 100 miles apart traveling towards each other on the same track. Each train tavels at 10 miles per hour. A fly leaves the first train heading towards the second train the instant they are 100 miles apart. The fly travels at 30 miles per hour (relative to the...

What is a good way to train for the USAPhO? I know doing a lot of problems is KEY, but I was wondering along the lines of the best books. I have Halliday and Resnick as well as University Physics (don't ask why >_>) so I was wondering if doing these books is enough to become a semi finalist...

Hi I've been having an argument with a few friends about a theory of mine (based on what i can remember from my physics lessons and common sense (i think lol). My theory is this. There is a train traveling at 100mph in one direction There is a man with a gun standing at the back of the...

I need to find the Fourier Transform (FT) of: x(t)=\sum^{\infty}_{n=-\infty}((-1)^{n}\delta(t-nT)) Not really sure how to solve this problem, so any help will be appreciated. Also, if you guys know a good reference for non-uniform sampling and reconstruction, please post it.

HELP! Answer pls ^^ a tube train covers 432m from rest to rest in 1 minute. It first accelerates 1/3 m/s2 then goes uniformly and finally retards at 1 m/s2. Find the time taken in each of the three stages of the journey. PLEASE HELP ^^ CONFUSED ON WHAT FORMULA AND HOW TY...

A model-train car of mass 230 g traveling with a speed of 0.50 m/s links up with another car of mass 430 g that is initially at rest. What is the speed of the cars immediately after they have linked together?

I hope this is OK to post here. I thought it would be better here than in the math questions forum, since you are EEs, and probably have more experience dealing with things related to the delta function. Problem Let \hat{x}(t) = \sum_{k=-\infty}^{\infty}\delta(t-2k). Now let x(t) =...