Challenge Definition and 942 Threads

The Challenge (originally known as Road Rules: All Stars, followed by Real World/Road Rules Challenge and occasionally known as The Real World/Road Rules Challenge during this time), is a reality competition show on MTV that is spun off from two of the network's reality shows, The Real World and Road Rules. Originally featuring alumni from these two shows, casting for The Challenge has slowly expanded to include contestants who debuted on The Challenge itself, alumni from other MTV franchises including Are You the One?, Ex on the Beach (Brazil, UK and US), Geordie Shore and from other non-MTV shows. The contestants compete against one another in various extreme challenges to avoid elimination. The winners of the final challenge win the competition and share a large cash prize. The Challenge is currently hosted by T. J. Lavin.
The series premiered on June 1, 1998. The show was originally titled Road Rules: All Stars (in which notable Real World alumni participated in a Road Rules style road-trip). It was renamed Real World/Road Rules Challenge for the 2nd season, then later abridged to simply The Challenge by the show's 19th season.
Since the fourth season, each season has supplied the show with a unique subtitle, such as Rivals. Each season consists of a format and theme whereby the subtitle is derived. The show's most recent season, Double Agents, premiered on December 9, 2020. A new special limited-series, titled The Challenge: All Stars premiered on April 1, 2021 on the Paramount+ streaming service.

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  1. I

    Can E.S.P be scientifically proven? Join the challenge and find out!

    Putting E.S.P to the test by Physicist. I think we need a PF to choose Items of their choice and have all the people in the forum try to perceive the items by E.S.P (Extra Sensory Perception) just to see the ratio of results and post the end results when the item is perceived by a User, To...
  2. A

    Friction Challenge: Increasing Speed?

    Can anyone think of a way where friction increases the speed of a moving body, instead of decreasing it? Or prove that this is impossible.
  3. A

    Building a Gravity-Powered Vehicle: 5 Meter Challenge

    i have to build a vehicle "powered soely by gravitational potential energy that will travel at least a linewar distance of 5 meters under its own power. no elastic potential energy (such as a mousetrap) allowed" i was wondering if anyone out there had any idea on where to start or knew of a...
  4. S

    Solving a Robotic Transport Challenge: Stumped on Spherical Tyres

    I had planned to use spherical tyres for my engg. project on a robotic transport vehicle, but I'm stumped on how to get it done. Magnetic force could be an answer but monopoles are not possible...i'm stumped...Could someone provide me the answer:??:bugeye: thethi.hs@gmail.com
  5. P

    Proving Inequalities with n > 2: A Challenge

    Dear all, I want to prove that the following inequalities are true. I hope you can give some hints. Thanks a lot! Define c_{\beta}=\sum_{j=1}^n \sigma_j^{\frac{2\beta}{\beta+1}}\sum_{1\leq i<k \leq n}\Big( \sigma_k^{\frac{2}{3(\beta+1)}} + \sigma_i^{\frac{2}{3(\beta+1)}} \Big)^3 ...
  6. D

    Challenge: 23 Words or Less to Use Every Letter of Alphabet

    So, for whatever reason, I got to thinking. Let's suppose you have a 4 letter word, say "tile". You change one letter to make a new word, "mile", and then again to "mild", and then "mold", etc. How many iterations would you need in order to use *every* letter of the alphabet (in the above I've...
  7. H

    Pumpkin Tower Challenge: Calculating Velocity at Launch & Landing

    Can anyone help with this problem?? Children bring their old pumpkins to a tower and compete for an accuracy in hitting a target on the ground. Suppose the tower height is h=8.0m and the bull's eye on the ground is a distance d=3.4 m from the launch point. (neglect air resistance.) If the...
  8. JamesU

    My Movie Challenge: 7 Films I've Seen

    I suck at it. I have 7 so far http://www.funwithmovies.com/
  9. M

    Calculating Impulse Using FΔt: A 4.0-N to 15 N Challenge

    okay I am not sure what the right answer is out of these multiple choices because I am not sure how exactly to use F delta T. A 4.0-N force acts for 3.0 sec on an object. The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the...
  10. U

    Solving a Physics Society Domino Challenge

    Hi to everybody I am a student in physics department of M.E.T.U (Middle East Technical University). I am also a member of Metu Physics Socity a group of people want us (From the physics Society) to make a domno show for an international fair opening. We thought to make a show with nearly...
  11. D

    Checking Work on Condensing Steam: A Challenge!

    I'm not sure if I'm approaching these problems correctly. Could someone check my work? Steam at 100°C is condensed in 500g of water at 20°C. a. What is the maximum amount of steam that can be condensed in this amount of water? Q[steam] = m[steam] * L[c steam] * (T[f] – T[i]) Q[steam]...
  12. J

    Challenge Challenge where you have to make each number from four 4s

    Have you ever heard of that challenge where you have to make each number from four 4s? This list is the best I have been able to come up with, will you help me fill in the gaps? Any solution that is simpler than one here can take its place, for example if you come up with a solution to 33 that...
  13. P

    Proving Angle DBA + Angle DBC = 180: A Challenge!

    The question is: Prove suppose A,B and C lie on a line L, with B between A and C, and that D is not on the line L. Prove that angle DBA + angle DBC = 180 this question is obvious. But because its obvious its hard to prove. Say that X = angle DBA and Y = angle DBC therefor cos(X + Y) = -1...
  14. P

    Exploring Magnetic Energy with Plasmas: A 11th Grader's Challenge

    I just started physics, I am in 11th grade and we needed to do a project in some class and I want to do this, but I really need help. I asked my teacher about doing something on magnetic energy (I would have no clue where to begin though…) and she brought up plasmas and doing something on those...
  15. JasonJo

    Calculating Lengths & Proving Identities: A Math Challenge

    1. calculate the length of the following paths: f(t) = (7, t, t^2) over 1<t<3 the way i was taught in class to calculate the length of a curve is to integrate the magnitude of the velocity, but i can't seem to naturally integrate the magnitude of (0, 1, 2t) similarly for: f(t) =...
  16. K

    Any good programming challenge using the c language.

    I am currently in my second quarter learning the c language. The class is not hard at all, but i want some challenge problems. Are there any goods links?
  17. K

    Proof of Electric Field Zero Inside Cylindrical Shell: Coulomb's Law

    Given an infinite long cylindrical shell of inner radias a and outer radius b. proof using coulombs law that any point inside the inner radius a, the eletric field will always be zero.
  18. D

    Using physics to solve stunt challenge

    Hello All, Recently I was asked to help provide some off the cuff calcuations for a stunt being peformed by a friend. It was a bit of challenge for me since I haven't cracked open a physics books in a long time. I used the Newtons laws, standard conservations of energy, conservation...
  19. L

    Navigating the Wind: A Pilot's Challenge

    A pilot flies at 140 km/h. The heading is due East for 1 hour,due South for 1 hour, due west for 1 hour and due north for 1 hour. IF a steady wind blows at 60 km/h, how long and at what heading must he fly to return to the start point? The wind is blowing in a northwest direction
  20. D

    Solving the Physics Problem: Position of Object Leaving Compressed Spring

    An object is place against a compressed spring at the bottom of an air track that slope upward at an angle 30. When the spring is release, find at which position, the object leave the spring? Given: the spring is compressed A, the spring constant is k, m is mass of object, mass of spring is...
  21. P

    The Chemistry Society's Unique Mocktail Challenge!

    Ok, so my college has this BIG "mocktail" competion every year. Each student activity group comes up with a unique mocktail (cocktail without alcohol), that somewhat relates to the organization. The mocktails are then taste tested and voted on. So I'm in chemistry society and I've been told...
  22. M

    Securing PVC Pipe Cap: A Challenge

    I am building this project which involved to PVC pipe chambers to be semi-pressurized (I know PVC isn’t intended for pressure, but I am not talking 200 psi, 40 to 60 psi theoretical MAX, usually around 5 to 10 psi). I have a pretty good depiction of the set up made in ASCII art, but I...
  23. T

    US Army FPS: Challenge Yourself and Play for Free!

    This is probably one of the best FPS out there. Developed by the US Army, highly challenging, requires some strategy, teamwork and it's FREE! And now back to my so-called life...
  24. J

    How can we design a container to protect an egg from a 5 meter drop?

    I'm a senior in high school, and we were just assigned the famous egg drop project... Here are the rules/restrictions/guidelines that our teacher gave us: You will design a container for an egg that will keep the egg from breaking when dropped from a height of approximately 5 meters (we're...
  25. M

    Calculating Water Flow at 25mph: A Pool Design Challenge

    does anyone know how i could go about calculating how much power is needed to move 1,972,080 gallons of water at a constant rate of 25mph or 475,200,000 ft/s?...my friend and i are trying to figure out how to draw up a pool of water that would do this and i don't know how i could go about...
  26. Norman

    I love the TV show Most Extreme Elimination Challenge

    I love the TV show Most Extreme Elimination Challenge also known as MXC. It is horrible and has no redeeming social value, but I laugh my butt off. Anything that is voiced over in English I find funny, but this game is completely out of control. Anyone else a fan? My wife and I love to watch...
  27. M

    Relativity Challenge: Proving Einstein Wrong or Exploring Physics?

    This site was linked at the top of the physics forums website. www.relativitychallenge.com I guess everybody has freedom of speech. Do people just get a kick out of proving Einstein wrong?
  28. honestrosewater

    Test Your Name-Remembering Skills: A Challenge!

    What's my name?? Several PFers recently mentioned that they think they're bad at remembering names. I'm wondering how other people do on this test, because I think I'm good with names and performed horribly at first. You 'meet' 8 people. You're shown their picture, they tell you their...
  29. A

    Special Relativity Knowledge Challenge (for experts only)

    This is specifically targeted towards those who claim to be experts in the area of Special Relativity. The following derivation derives the Lorentz equations of special relativity. Follow the derivation and list the assumptions (postulates) used to derive the theory. That is to say, if a...
  30. DaveC426913

    LaTeX Finding Latex Instructions: An Unnecessary Challenge

    Why is it so hard to find the latex instructions when I need them? I have to go to FAQ and do a search. But what's really weird is that the actual link to the post isn't even live. I have to select and copy it, then paste it into my address bar.
  31. H

    Solving the Challenge: Finding Block's Displacement

    I'm half way through this problem, but I'm stuck at the end. A block of mass m = 4.5 kg rests on a frictionless floor. It is attached to a spring with a relaxed length L = 5 m. The spring has spring constant k = 11 N/m and is relaxed when hanging in the vertical position. The block is...
  32. *Kia*

    Mental Challenge SFW - Planarity @CWRU

    http://home.cwru.edu/~jnt5/Planarity/
  33. G

    Find Faulty Coin: Weighing Balance Challenge

    you have 9 coins. one of these coins is faulty, that is it is either heavier or lighter than the rest. you have a weighing balance. in thre weighings you have to find 1. which is the faulty coin and 2. is it heavier or lighter.
  34. I

    Obtaining Energy from Stars: Grand Challenge

    What is the most effective way to obtain energy from a star? Answers may not include: 1. photovoltaics 2. mirror concentrators since they are already well understood.
  35. H

    Proving Time Exists in a Vacuum: A Challenge

    in a vacuum, where there is no proof of any type of particle, how do we possibly know that time exist's? and if you have a completely unreactive or still particle, how could you prove that time exists for that particle?
  36. W

    Integrating cos(u^2): A Calc One Challenge

    \int cos(u^2)du Is it doable at a Calc One level? I tried by parts and got to \int cos(u^2)du = ucos(u^2) + 2\int(u^2sin(u^2)du but I am having a brain fart as to hwo to advance, trying again by parts.
  37. D

    A weird domain and range? anybody up for a challenge

    A weird domain and range? anybody up for a challenge y=x^2-2x+1 / x^2-x-2 try it on the gfx calculator and check if this domain and range is right i wrote Domain ( -infinity, -1 ) union (-1,2) union ( 2, infinity) range (-infity, 0) union (-1 to infity) is there an easier way to...
  38. A

    Daniel's Physics Challenge: Forces on a Banking Bike

    G'day everyone! This is my first post here, so hello to everyone. :smile: Anyway, I'm having some trouble with my physics (yr12 in Australia, which is final year high school). :confused: What are the forces acting on a bike that is banking as it travels on a circular road? Is the...
  39. A

    Egg Drop Challenge: Minimize Mass and Avoid Padding

    I need to drop an egg off my school bleachers. I can't use any kind if padding, cushining, or packing material. The entire egg may be covered but does not have to be. The contraption also needs to be of the smallest possible mass. Please post any suggestions that you can. Thank you all.
  40. B

    Gridlock Level 24 - Brain Teaser Challenge

    http://www.ebaumsworld.com/gridlock.shtml I'm on level 24 right now and it's not easy.
  41. Astronuc

    Synthesis Challenges at Innocentive.com

    Innocentive.com provides opportunities for those who specialize in synthesis. See examples at - http://www.innocentive.com/servlets/project/ProjectInfo.po?type=Chemistry&e=mar16_featured
  42. M

    Solving Physics Lab Challenge: Aim the Gun for the Cup

    he everyone again! today, i just got a lab for physics. I have two days to really examine that gun. the teacher will give me an angle that i should aim the gun, and a cup. I should know the distance between the gun and the cup so that when i launch the ball, it will go inside the cup... first...
  43. A

    How Does Line l Intersect and Divide Line Segment AB in a Maths Challenge?

    Distinction Maths Challenge the line 2x + 3y-8=0 cuts the x and y-axis at A and B respectively. The line y=ax+7 is called l. Find a). in terms of a, the coordinates of the point where l cuts AB (extended). b). the value of a if l is to divide AB internally in the ratio of 1:3. please...
  44. G

    Egg Drop Challenge: Pack it Right or Die Trying

    egg drop tomarrow and no idea what to do i need help really bad rules- max. two different type packing materials 3 materials in all egg must survive drop from gym rafters if it brakes i get 0 egg will be raw no parachutes egg cannot...
  45. G

    Proving a Sum of Powers of Integers: A Challenge!

    Hey! Can someone please give me a hint on this :rolleyes: Prove: \sum_{n=1}^n i^4 = \frac{n(n+1)(2n+1)(3n^2 + 3n - 1)}{30} What I've got so far: Let P(n) be the statement: \sum_{n=1}^n i^4 = \frac{n(n+1)(2n+1)(3n^2 + 3n - 1)}{30} Let n=1 we get; \sum_{n=1}^1 i^4 =...
  46. Y

    Can You Help with the Egg Drop Challenge?

    EGG DROP! woohoo! Hello all! I have been getting frustrated with this certain physics project... the materials are as follows: 5 sheets of computer paper 1 meter of masking tape 1 raw egg THAT'S IT! any ideas on how to make the egg survive? parachutes? baskets? i know you have to...
  47. D

    MacGyver Challenge: What Book & Object Would You Take?

    OK, so this is not really a challenge but more of a questionaire (sorry to disappoint you). I was going to ask this question in this room and the engineering room to see both sides of the story. But hopefully we will get plenty of both in here. Since I am only posting it in this room, please...
  48. A

    Redemption - I Challenge Dextercioby

    Please DON'T delete this thread. I want to make a point here... I want other experts in physics to determine who’s wrong in this situation… This was the problem taken from: https://www.physicsforums.com/showthread.php?t=58831 “A 5 kg block is fastened to a vertical spring that has a...
  49. S

    Challenge Accepted: 3 Hard Physics Problems for You to Solve!

    Can three people here post one hard physics problem for me to solve??! (That's one person per problem)
  50. S

    Some general questions for those who like a challenge

    There seemed no board where these were all appropriate. Rather than spreading them around the place I'm hoping this may be the place to start with these. 1) If the Higs Bosun gives particles mass, what gives the Higgs mass ? And considering our best understanding of mass and gravity to...
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