Running Definition and 386 Threads

Running is a method of terrestrial locomotion allowing humans and other animals to move rapidly on foot. Running is a type of gait characterized by an aerial phase in which all feet are above the ground (though there are exceptions). This is in contrast to walking, where one foot is always in contact with the ground, the legs are kept mostly straight and the center of gravity vaults over the stance leg or legs in an inverted pendulum fashion. A feature of a running body from the viewpoint of spring-mass mechanics is that changes in kinetic and potential energy within a stride occur simultaneously, with energy storage accomplished by springy tendons and passive muscle elasticity. The term running can refer to any of a variety of speeds ranging from jogging to sprinting.
Running in humans is associated with improved health and life expectancy.It is assumed that the ancestors of humankind developed the ability to run for long distances about 2.6 million years ago, probably in order to hunt animals. Competitive running grew out of religious festivals in various areas. Records of competitive racing date back to the Tailteann Games in Ireland between 632 BCE and 1171 BCE, while the first recorded Olympic Games took place in 776 BCE. Running has been described as the world's most accessible sport.

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  1. D

    Discover the Impact of Running Shoes on Speed | Expert Insights

    Not sure if this is technical enough to go into another category. I have been running recently, and I can't find out if running shoes increase or decrease running speed as opposed to wearing no shoes at all. I have used google, but I am not finding the answer I am looking for.
  2. W

    Running electricity long distances (or alternatives)

    Hi guys. I'm new to these forums, but have been wanting a place to ask questions like this for awhile. You all seem like a nice bunch (unlike the computer science communities I'm typically a part of) so I'd like to start off with a topic that's been bugging me for awhile. My father has a...
  3. B

    C/C++ Having trouble running C++ compiler

    The type of compiler I am using is Dev-C++. I have no problem compiling my code and my compiler has generated no errors. However , when I try to run my code, The command prompt for like a nano-second and disappears and I have no idea of how to retreive it .
  4. B

    Will Running Increase Spit-Distance? Experimenting with Physics!

    Inspired by http://www.news.com.au/story/0,23599,23696646-13762,00.html" . Would running before you spit increase the distance your spit travels? I figure, most of the energy comes from your mouth, and you'd probably stop at the end of your run, so would a "running start" increase the distance?
  5. N

    Surviving College: Physics II, 4 Years To Go!

    So my school semester is almost over. I took the following... Calculus II Physics II Chemistry II Linear Algebra I'm getting good grades (3.5-4.0), but I really need to go over the Physics text. We covered so much material that I couldn't keep up with reading the proofs and connecting...
  6. L

    C/C++ Running a Fortran 77 program in a C++ enviorment/program

    I hope someone out there can help me out on this one. I have intermediate C++ experience, just a working level knowledge, however my prof. threw me a project to work on and where I am at now I have no experience with. So this is what's up, I have a massive fortran 77 program...that does some...
  7. B

    Solving Pool Dimensions - Length = 30 ft, Width = 60 ft

    The length of a rectangular swimming pool is twice its width. The pool is surrounded by a cement walk 4 ft wide. If the area of the walk is 748 square feet, determine the dimensions of the pool. A= the total area bounded by the outer edge of the surrounding walk W= the area of the walk P=...
  8. D

    What minimum speed must he be running?

    A 17m--long vine hangs vertically from a tree on one side of a 10m--wide gorge, as shown in the figure. Tarzan runs up, hoping to grab the vine, swing over the gorge, and drop vertically off the vine to land on the other side. What minimum speed must he be running?
  9. nickclarson

    Help Conservation of momentum: contestant running on raft. Tough

    Homework Statement A 62.7-kg woman contestant on a reality television show is at rest at the south end of a horizontal 141-kg raft that is floating in crocodile-infested waters. She and the raft are initially at rest. She needs to jump from the raft to a platform that is several meters off the...
  10. K

    Problems on running graph with c

    Hi! I am using a a VISTA Premium system. When i write program containing graphs with turbo and i try to run it a message appears on the screen as " BGI Error: graphics not initialized (use 'initgraph')" . So can somebody tell me what's wrong with my system. Do i have to change it or i have to...
  11. S

    Troubleshooting XP Programs on Vista: Compatibility Tips

    I would like to post a solution I found to a common problem, and invite comments from people who know of even better modifications. I have had major problems getting certain programs that run fine on XP to run on Vista. I have found that if before installing the program on a Vista machine...
  12. Ivan Seeking

    Joke - Bill Clinton: 'Screw It, I'm Running For President'

    http://www.theonion.com/content/news/bill_clinton_screw_it_im_running Edit: This is of course a joke and not to be taken seriously.
  13. C

    Good computer for running electronic structure calculations?

    Hi- We're thinking of purchasing Gaussian 03 for electronic structure calculations. I think the basic license only allows for it to be run on a single processor. Can anyone recommend a decent desktop <1500 dollars that will do a decent job at running electronic-structure? I suspect that...
  14. Ivan Seeking

    Anne Mahlum's Homeless Running Club: Inspiring Change

    You can watch the video at the top right corner of the screen. http://abcnews.go.com/WN/PersonOfWeek/story?id=4003180&page=1 Here is the website http://backonmyfeet.org/main/index.html
  15. P

    Calculating Calories Used Running

    Hello: I am trying to figure out a way to calculate the number of calories burnt running. Before I do on to explain how I am doing this, I realize that there are many calculators out there that will do this for me, my interest is in finding out how this is calculated. I have had some...
  16. B

    Running 24V on two 12V batteries

    Hi, can I connect two 12v batteries in series to get 24v and also each battery has individual connectors connected to 12v alternator from engine for charging? Would this cause problem? Or what type of converter (if there is one) that can do 12v to 24v with max. 50amp. Another option I...
  17. B

    Solving the Problem of a Bus Running Out of Fuel on a Hill

    Homework Statement A bus runs out of fuel as it approaches a hill. If the hill is 3.54 m high, how fast must the bus be traveling in order to coast just to the top of the hill? Homework Equations The Attempt at a Solution How do we solve this problem?? We aren't given any...
  18. E

    Rotational Kinetic Energy -> Lightning Speed Running?

    Homework Statement Suppose a solid cylindrical flywheel has a mass of 200 kg and a radius of 0.8 m and rotates at a rate of 15,000 revolutions per minute. If you were able to convert all of its rotational kinetic energy into making you run, how fast would you be going? (Assume your mass is...
  19. Ivan Seeking

    How Does Visualizing Statistics Change Our Understanding of American Culture?

    http://www.chrisjordan.com/current_set2.php Depicts two million plastic beverage bottles, the number used in the US every five minutes.
  20. Q

    Momentum of child running problem

    Momentum...please help! Homework Statement A child of mass 31 kg sits on a wooden horse on a carousel. The wooden horse is 4.2 m from the center of the carousel, which rotates at a constant rate and completes one revolution every 6.7 seconds. What are the magnitude and direction of the...
  21. L

    Would running an electrical current through a magnet destroy the magnet?

    Hello, Suppose you had an iron magnet. What effect would an electrical current have on this magnet? Would it still retain its magnetic properties? Thanks in advance for the help.
  22. I

    Does anyone know how to get up and running with PIC microcontrollers

    Homework Statement I have 6 weeks to master PIC microcontrollers for a design project. Does anyone have any resources that are good for getting a moderately complex project up and running in this time frame? Homework Equations none The Attempt at a Solution I've read through...
  23. W

    Gravity and Running: A High Schooler's Perspective

    Hey. I'm a serious runner, and lately I've become very interested in biomechanics and running form. One thing I've found very interesting is a subset of running systems based around the concept of using gravity for forward motion. The general idea is that by keeping a straight body, but bending...
  24. F

    Understanding Rotational Velocity in a Hamster Wheel

    If a hamster runs in a wheel, how do I figure out the rotational velocity that the wheel achieves (after it stops accelerating)? Is it to do with the mass of the hamster or the speed at which it runs? I'm familiar with the basic concepts of rotational motion (moment of inertia, torque etc) but...
  25. marcus

    QMD running G and Lambda challenges Loop Gravity

    "QMD" running G and Lambda challenges Loop Gravity As I see it, and I may be missing the point entirely, this is a moment of opportunity and change for LQG and related researches. In brief, the story is that for several years Reuter has been saying that Newton's G and the cosmological Lambda...
  26. T

    MATLAB Matlab: Saving and Running M-files

    I've noticed a weird thing that Matlab does whenever I save my m-file then try to run it. If I save my M-file with a simple file name like "HW4" or "untitlited" it will run. However if i save my m-file as file name HW#4_3.40 (I just wanted to label the file with the problem # from the text I'm...
  27. U

    Can Point Particles Have Infinite Energy in Fields?

    When finding the amount of energy stored in the electric field of a point particle, one finds that it is infinite (due to the r = 0 limit in the integral of the energy density). Does this mean then that the field will never "run out" of energy? How can the electric field of a point charge, or...
  28. D

    Is Running Your Heat Pump 24/7 More Efficient? Debunking Common Myths

    Hi, Is it more efficient to run a heat pump in a house 24/7 or turn it off at night time and during work. All the pros seem to say its more efficient running them 24/7 I can't understand that as there is more heat loss with the greater heat differential running it 24/7 Thanks Darren
  29. A

    Speed of the second hand of a smoothly running analog watch?

    (a) What is the angular speed of the second hand of a smoothly running analog watch? ____ (rad/s) i got 0.03 pi webassign says "Check the syntax of your response" i also tried 0.03, but it's wrong also.. how do i put my answer?
  30. P

    How much does body weight affect running?

    Compare someone who is 10kg overweight to normal weight, how much faster and better can the normal weight person run a 5km race? Assuming each received did the same training and diet during the training. So both person might lose weight after the training period but their weight difference will...
  31. wolram

    What Was the Unidentified Running Object in My Driveway?

    Unidentified running object. Its 9 o/clock at night and i am just getting into my car, when this white shape less thing shoots past me, now there is no wind ,as my first thought was litter blowing around, when the thing started to wander all over the place at about my walking pace, i had...
  32. U

    Biological legs vs Cheetah prosthetic legs - wich is better for running?

    Biological legs vs Cheetah prosthetic legs - which is better for running? EDIT: I misspelled "which" in the subject line, how embarrassing. You may have heard of Oscar Pistorius, a double below-knee amputee from South Africa who recently won the silver medal in the 400m at the South African...
  33. DaveC426913

    Get a server running locally to run a Struts app

    I need to get a server running locally so I can run my 'Hello World' Java Web app. http://benmira.free.fr/en/j2ee/struts1.htm" I'm using. Unless I misunderstand, all I really need to do is copy all the code into flat files with the appropriate filenames - and then compile it with Ant. But...
  34. J

    Calculating Velocity Components of Running Horses Using SOHCAHTOA

    Running Horses-----SOHCAHTOA Homework Statement A herd of wild horses races across the flat, open plains of the Great Basin in central Nevada. If the horses are running at 12.2 m/s at a compass heading of 340 degrees, what is the northward component of their velocity? And, what is the...
  35. W

    Calculators Running Programs on ti-89 titanium

    I am using a ti-89 titanium for maths this year(my first graphics calculator) and in class we covered some basic programming for ti-84(the minimum calculator for this year). I made some basic formulae programs but now i can't find how to run them. Can anyone point me in the right direction?
  36. Evo

    Herding Cats, Running with Squirrels and Lamb Streaking

    Herding cats removed Running with Squirrels removed Lamb streaker http://www.youtube.com/watch?v=Q6Fh1zIVaRs&mode=related&search=
  37. I

    Understanding GUT Symmetry: Running Couplings

    Hi, I'm very new to the field of GUT symmetry and would like to understand a passage in the book "Collider Physics" the page reads: All couplings evolve with the mass scale as discussed in chapter 7. Only particles with mass < mu contribute to the evolution at any given mass scale mu. Hence...
  38. N

    Can someone help with mathcad 13 not running

    My professor told us he wants all our work done in mathcad, so I buy the program, load it, get it activated, do my homework, and save. Today I try to load it to print it, and the darn program will not load. It gives me an hourglass for a few seconds, then the hourglass goes away and it never...
  39. Apost8

    News Bill Frist not running for President

    What a relief! Even though he only had a snowball's chance, it was still enough to make me nervous. http://www.cnn.com/2006/POLITICS/11/29/frist.presidency.ap/index.html"
  40. R

    News Is America Shifting Right with Brownback's 2008 Bid?

    Social conservative uprising? Brownback is back Something that hasn't been discussed too much, amid the 'apparent' Democratic sweep, is whether the whole USA has been moving farther to the right, Democrats included (Harold Ford, anyone?). I'm amazed to see that Sam Brownback's 2008 presidential...
  41. V

    VFD problems motor not running?

    Hi all, I am new on the forum. I have a customer who is having some problems with running their motor with the VFD. I realized they had tampered with the setup parameters and luckily we corrected all the parameters. However, they have gained control on the motor, but the motor is...
  42. J

    Can Transformers Exhibit Gain When Tuned or Combined Uniquely?

    Hello, Are there any coil setups for transformers that when tuned or combined in weird ways run with gain? I heard that coupled inductors for CB radio antennas do this, but are there any effects similer to this for transformers? I heard an account from someone who said that two out of tune AC...
  43. S

    What is the minimum speed required for a man to catch a moving bus?

    Sorry, I should have posted this in my other thread! Here's the information for the question: "A man is running at speed c (much less than the speed of light) to catch a bus already at a stop. At t=0, when he is a distance b from the door to the bus, the bus starts moving with the positive...
  44. S

    Running the red light (car physics)

    Here a description of what I do to. Your client was ticketed for running a red light but claims that he did not run the light. You must make a case to the judge explaining why your client was unjustifiably given a traffic citation for running a red light. You must determine the speed of the...
  45. B

    Running in the Rain: Mythbusters Results & Sun Rays

    I recently saw an episode of mythbusters where they tested the theory that if you run in the rain you get less wet. Their results turned out to be the exact opposite, they found that running in the rain actually made you more wetter. I'm wondering now, taking into account only the "falling" rain...
  46. P

    How Can I Play .RAR Video Files and Record Live Video to My Computer?

    hello, can anybody help me with a program to run .rar(basically video) files? Thanks Jake
  47. M

    Who created this running difference image?

    http://trace.lmsal.com/POD/TRACEpodarchive4.html http://trace.lmsal.com/POD/movies/T171_000828.avi I've sent several emails to Lockheed Martin trying to ascertain the author of this image. I would like to get some specifics about the image regarding the start and end times, the cadence...
  48. E

    Running 1500W off car batteries

    I'm going to be running an appliance off car batteries. Appliance specs: 120V 60HZ 12A 1500W I need to run it for about 6 hours. Would a single car battery with an engine running maintain that power? Or will i need to connect several up in series??
  49. M

    Rotational Kinematics of Running

    Hi I need some help. The question is: At the local swimming hole, a favourite trick is to run horizontally of a cliff that is 8.3m above the water. One diver runs off the edge of the cliff, tucks into a ball and rotates on the way down with an average angular speed of 1.6rev/s. Ignore air...
  50. P

    Two football players are running at each other

    This may be a simple question but say if two football players are running at each other with equal momentum why does the one who gets lower so to speak win?
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