What is Track: Definition and 348 Discussions

a mass m is suspended on a string and the glider slides over to the right. the system is frictionless and I'm wondering how to find the acceleration of the system with the mass m as 5 gram, and the glider mass as 40gram

Homework Statement Stan and Ollie are standing next to a train track. Stan puts his ear to the steel track to hear the train coming. He hears the sound of the train whistle through the track 3.1 s before Ollie hears it through the air. How far away is the train? (Use 5,790 m/s as the speed...

Since we seem to have a few professors and grad students on this forum, I was hoping to open a discussion on the current employment trends in math academia. It seems as is the road to tenure is incredibly difficult and it takes more than just writing a good thesis to get a job. I am posting...

http://users.on.net/~rohanlal/roll.jpg A roller-coaster car has a mass of 494 kg when fully loaded with passengers. If the car has a speed of 12.5 m/s at point A, what is the force exerted by the track on the car at this point? To solve this don't i need to determine what the downward...

Homework Statement People put their ears to a railroad track to get an early warning of an approaching train. why did this work. Homework Equations written response. The Attempt at a Solution Sound waves can travel a long way along an undisturbed metal rod?

Homework Statement A wire carries a current of 3 A in the downward direction. What is the magnetic field 2.0 cm away from the wire? Homework Equations ∫B·dl = µ0I The Attempt at a Solution So I pick a circle with radius 2.0 cm to go around the wire, and get B∫dl = µ0(3 A) ∫dl...

Homework Statement A small solid marble of mass m and radius r will roll without slipping along the loop-the-loop track, shown below, if it is released from rest somewhere on the straight section of track. For the following answers use m for the mass, r for the radius of the marble, R for the...

using a puley for analysis on an air track? I'm doing an experiment using an air track, and my school only has one photogate/lightgate. So I'm trying to figure out a way of using the pulley (not an actual pulley, one that is used with a data logger to record time and velocity) without it...

Homework Statement Two carts are set up on an air track with a rubber band connecting them. The carts are pulled just slightly more than the length of the relaxed rubber band. Upon release, mass 1 travels a distance of x1 and mass 2 travels a distance of x2. Show that...

Hi everyone! I try to build a device that can track 6 degree of freedom of itself but lacking a method provide enough accuracy. So I'm here asking you for help The device's size needed to be about a cell phone or smaller The accuracy needed to be enough for detect movement about 1/10 mm...

Homework Statement i have an air track glider on a track that is tilted. the distance between the initial position and the photogate that measures the time it takes for the glider to pass the photogate in 0.001s is .5m I need to find the angle theta that will give me 25m/s (the max measurable...

http://news.bbc.co.uk/1/hi/world/europe/7849600.stm Speaking of those in power being arrogant, I think maybe the Vatican ought to look at their own agenda through the lens of those in poverty or afflicted with aids, instead of the gold gilded windows of the Vatican? The list of what they...

I have to find the power series f(x)= 3 / (2 -5x). I devided everything by 2 so I have (1/2) / (1 - 5x/2) = \sum ar^n and then through some steps I have 15x^n / 2^n+1 and I on the right track? How do I find the interval of convergence?

I recently ran into something between two teachers. For the longest time one has been teaching that when a car is traveling in circular motion on a banked track with friction, only the horizontal component of the friction force is to be taken into account, by adding to the centripetal force...

Homework Statement A frictionless track with a loop of radius 36 cm sits on a table 0.9 meters above the ground. If a 0.15 kg object just makes the loop, how high above the table did the object start and how far from the table does it land? Homework Equations The Attempt at a...

Homework Statement roller coaster traverses a vertical circular track. a)what speed must car have to make it over the top w/o leaving the track? assume it is not attached to track. b)what will speed be at bottom? c)what will normal force on passenger be at the bottom of loop if radius is...

Homework Statement A block of mass 0.640 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point B, the bottom...

Homework Statement A roller-coaster has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m. When at the top of the hill, the car has a speed of 8.0 m/s. WHat is the force of the track on the car at the top of the hill? Homework Equations F=ma...

I have a science fair coming up for school, and while I have been doing a ton of research, I have a few questions. I am attempting to recreate an experiment in which a supercondcutor levitates back and forth along a track of permanent magnets. The track consists of 23 magnets, 3 magnets to a...

1. A 50 g ball is released from rest 1.0 m above the bottom of the track. It rolls down a straight 30 degree segment, then back up a parabolic segment whose shape is given by y = 1/4x^2, where x and y are in m. There is a picture shown too, but I can't figure out how to get it in the post...

A particle can slide along a track with elevated ends and a flat central part, as shown in Figure 8-53. The flat part has length L = 40 cm. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is µk = 0.32. The particle is released from...

Homework Statement A runner times his speed around a circular track with a circumference of 0.520 mi. At the start he is running toward the east and the track starts bending toward the north. If he goes halfway around, he will be running toward the west. He finds that he has run a distance of...

Homework Statement a car travels around a track at a speed of 5 rev/s. the track begins with a radius of 35m and spirals such that the radius increases 5m/rev. give the speed and position of the car as functions of time. express your answers as polar vectors. Homework Equations...

Strange thing about the Olympics- Track Runners' "USA" Why do the track runners from the United States have their "USA" in magic marker, while the others are clearly printed? http://www.flickr.com/photos/29601881@N05/2787191037/

Homework Statement Integrate g(x,y,z) = y + Z over the surface area of the wedge in the first octant bounded by the coordinate planes and the planes x = 2 and y + z = 1. Homework Equations see below The Attempt at a Solution see below

A slide wire (resistance R) travels without friction along the track shown below. It starts from position x0 (non-zero) and velocity v0 , to the right as shown. Assume that the v shaped rails meet at an angle of q. Use the coordinate system shown. The magnitude of the external magnetic...

[SOLVED]If fast enough, a car can be driven on a track that is banked vertically. In the view of the 2008 formula one race in Singapore, the government has decided to build one such track. Given that the diameter of the track is 100m, and the coefficient of static friction between the rubber...

I have just done an experiment with a glider on an air track and applied a force to it. Its velocity increased very slightly and was wondering are there any reasons, other than friction, why the velocity could change during motion? Thanks I thought this but i don't know if its right "There...

Homework Statement This question came up recently, and i personally have been weak regarding work and energy, i have only just started to understand Newtons laws sufficiently. There is a scan of the question attached. Could i please have an explanation this question? A 0.5-kg mass is...

I've actually been keeping track of CERN's development (although loosely) for about 4 years. Recently, there's been news of it and its almost finished. This stuff is amazing...can anyone tell me the goals of CERN??

Hello, New here. I have designed a segment of a track that I am building that I need to pull some data out of. It is a high-to-low transition (down hill) that takes the form of cosine over the domain [0,pi]. Thea graph of the transition's profile is y=5.5cos(xpi/18)+5.5 It is 11 inches high...

[SOLVED] Resultant Force for circular motion on a banked track Homework Statement A car travels 77 m/s around a circular track of radius 71.9 mass of car= 2800 kg coefficient of friction = .1 angle of track with horizontal = 22 degrees acceleration of gravity = 9.8 m/s^2 What is the...

How many poker tournaments must I track to obtain a "significant" sample Good afternoon. My question pertains to single table poker tournaments (aka Sit 'N Go's) and I hope some of the bright minds of this forum will find the question at least interesting. The type of Sit 'N Go I play is a...

As someone who's interested in the history/ideas of mathematics I'm attracted towards the pure track but I'm also attracted to the job prospects of applied math. Are my impressions wrong? Can one find employment with either concentration, or is the applied track superior in that regard?

Hey, today while watching the cricket I was fascinated by "Hawkeye" and how it predicted the ball trajectory, from the bowlers hand to a few metres past the batsmen. "Hawk-Eye is a computer system used in cricket, tennis and other sports to track the path of the ball."...

there is this great line from a song off the matrix sound track called 'ultrasonic sound' by dj hive. "There are doorways I haven't opened, and windows I've yet to look through. going forward may not be the answer. maybe i should go back". i think its a great line and I'm trying to find where it...

Hi, I've posteed about this rollercoaster already, so some of you may or may not recognize the whole idea but basically I have to construct a miniature rollercoaster for a ball bearing to run through. Now, my question here is much much differnt. I'm not looking for ideas or design tips, but...

A small particle slides along a track with elevated ends and a flat central part. The flat part has a length L = 0.40 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.12. The particle is releases from top of the track, which has...

Homework Statement A 23.0 kg block at rest on a horizontal frictionless air track is connected to the wall via a spring. The equilibrium position of the mass is defined to be at x=0. Somebody pushes the mass to the position x= 0.350 m, then let's go. The mass undergoes simple harmonic motion...

Homework Statement A uniform solid cylinder (m=0.230 kg, of small radius) is at the top of a similar ramp, which has friction. The cylinder starts from rest and rolls down the ramp without sliding and goes around the loop. Find the speed of the cylinder at the top of the loop. Homework...

[SOLVED] Particle movement down a track Homework Statement A particle of mass m = 6.60 kg is released from point A and slides on the frictionless track shown in the figure below. (ha = 5.20 m.) (a) Determine the particle's speed at points B and C. point B____________ m/s point C...

[SOLVED] Circular Motion Homework Statement A 1500 kg car drives around a flat 200-m-diameter circular track at 25 m/s. What is the magnitude and direction of the net force on the car? What causes this force? Homework Equations F_c = \frac{mv^{2}}{r} The Attempt at a Solution So I suppose...

A 1kg ball rolls along a circular track that is banked at 20 degrees. The normal force on the ball is 10.43N, tilted inward. The radius of the track is 10m. a. What is the net force on the ball (include direction)? b. How fast is the ball going for it to complete the turn? possible...

Homework Statement There are two tracks side by side, same height above ground, one ball is placed on one track, and the other one on the other track. A spring is pulled back, and it hits both of the balls with the same force. Both ramps end at the same place. one track looks like this ...

Homework Statement The position of a toy locomotive moving on a straight track along the x-ais is given by the equation x = t^6 - 6t^2 + 9t where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to _______? Answer in units of...

Homework Statement A small block of mass m = 1.3 kg slides, without friction, along the loop-the-loop track shown. the block starts from the point P at rest a distance h = 52.0 m above the bottom of the loop of radius R = 18.0 m. A)What is the kinetic energy of the mass at the point A on the...

Homework Statement A small block of mass m = 1.8 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 56.0 m above the bottom of the loop of radius R = 17.0 m. What is the kinetic energy of the mass at the point A on the loop...

Question on Motion of a car round a banked track [SOLVED] Homework Statement A racing car of 1000kg moves round a banked track at a constant speed of 108km/h. Assuming the total reaction at the wheel is normal to the track, and the horizontal radius is 100m, calculate the angle of...

Question: A. A car that weighs 12000.0 N is initially moving at a speed of 57.0 km/hr when the brakes are applied and the car is brought to a stop in 2.6 s. Find the magnitude of the force that stops the car, assuming it is constant. B. What distance does the car move during this time...

Homework Statement car is on a horizontal circular track of 80m radius and car starts from rest to 100km/h in 10 seconds. what's the magnitude a of ttotal acceleration of the car 8 seconds after start? Homework Equations normal acceleration = v^2/r The Attempt at a Solution...