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  1. #1
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Contest: The Math Game: Prize!!!!

    You have a rotating cylinder with a circumference of exactly 2199.1148575128552669238503682957 meters. It makes 1 complete 360 degree rotation every 120 seconds. You are in a vehicle that traverses 700 meters in 60 seconds from a dead stop on the surface. You launch vertically along the diameter line through the center of rotation. Where is your impact point going to be in the cylinder inner surface going to be?

    Winner with the first correct answer gets a free Titanium Membership for life. Good luck and may the odds be ever with you!
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  2. #2
    surly old man jgedwa's Avatar
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    It is going to hit the vehicle that launched it, so it will not hit the cylinder. jim
    Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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  3. #3
    Super Moderator no1mad's Avatar
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    Glad I got a Yellow Jersey (that I won) under the Blue Star because I suck at math
    Quote Originally Posted by Cyril View Post
    Ride what and in what manner pleases you. Those that mind don't matter, and those that matter don't mind. srsly.
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  4. #4
    Senior Member locolobo13's Avatar
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    Quote Originally Posted by jgedwa View Post
    It is going to hit the vehicle that launched it, so it will not hit the cylinder. jim
    That's what I get too. It should hit where it began.

  5. #5
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    As a Blue Star, even after you leave, if you leave in good standing, as staff, you'll retire with lifetime Ti. That's been policy for years and staff is not elegible.
    @jgedwa, assume a single stage vehicle.
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  6. #6
    Pedaled too far. Artkansas's Avatar
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    The vehicle takes 188.4955592 seconds to traverse 2199.1148575128552669238503682957 meters

    The cylinder rotates 1.570796327 times in 188.4955592 seconds.

    .570796327 of a rotation is 205.4866777 degrees

    So the vehicle hits the cylinder at 205.4866777 degrees.
    "He who serves all, best serves himself" Jack London

    Quote Originally Posted by Bjforrestal View Post
    I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.

  7. #7
    Senior Member RPK79's Avatar
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    The answer is C.

  8. #8
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Quote Originally Posted by Artkansas View Post
    The vehicle takes 188.4955592 seconds to traverse 2199.1148575128552669238503682957 meters

    The cylinder rotates 1.570796327 times in 188.4955592 seconds.

    .570796327 of a rotation is 205.4866777 degrees

    So the vehicle hits the cylinder at 205.4866777 degrees.
    You're overthinking this....we're dealing with a 60 second interval and the trajectory is through the center of rotation..
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  9. #9
    Pedaled too far. Artkansas's Avatar
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    You hit at 180 degrees.

    2199.1148575128552669238503682957/ pi = 700 meters.

    The vehicle goes 700 meters in 60 seconds.
    The distance the vehicle goes = the diameter of the cylinder.
    The cylinder will have rotated 180 degrees in 60 seconds.
    "He who serves all, best serves himself" Jack London

    Quote Originally Posted by Bjforrestal View Post
    I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.

  10. #10
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Incorrect and correct, at the same time, you've made an error in your assumptions in syntax. Remember, the launch point is 0.

    t_1=60
    t_2=120
    D=700
    C=Pi(700)

    D-(C/2)=0

    Impact = the origin point, which was @ 0, but is now @ 180.

    You impact right back where you started, in relation to the geography of the cylinder. Now, you won lifetime ti in a previous contest, so who would you like to gift it to?

    Quote Originally Posted by Artkansas View Post
    You hit at 180 degrees.



    2199.1148575128552669238503682957/ pi = 700 meters.

    The vehicle goes 700 meters in 60 seconds.
    The distance the vehicle goes = the diameter of the cylinder.
    The cylinder will have rotated 180 degrees in 60 seconds.
    Last edited by Tom Stormcrowe; 04-04-14 at 05:23 PM.
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  11. #11
    Senior Member Cache's Avatar
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    D. All of the above.

  12. #12
    Bicycle Repair Man !!! Sixty Fiver's Avatar
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  13. #13
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Quote Originally Posted by locolobo13 View Post
    That's what I get too. It should hit where it began.
    Whoops, I missed this answer, so sorry artkansas, locolobo won with the correct answer.
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  14. #14
    Senior Member jdon's Avatar
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    The starting point.


    oops. disregard.
    Last edited by jdon; 04-04-14 at 05:42 PM. Reason: slow thinker
    Quote Originally Posted by maddmaxx View Post
    How are you ever going to live in the real world if you can't get along with people who don't believe what your do?

  15. #15
    surly old man jgedwa's Avatar
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    I am still confused by exactly what was described, but did I get it right nevertheless in some kind of way? Seems like I might have. jim
    Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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  16. #16
    Pedaled too far. Artkansas's Avatar
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    Quote Originally Posted by Tom Stormcrowe View Post
    so who would you like to gift it to?
    Locolobo13 of course!
    "He who serves all, best serves himself" Jack London

    Quote Originally Posted by Bjforrestal View Post
    I don't care if you are on a unicycle, as long as you're not using a motor to get places you get props from me. We're here to support each other. Share ideas, and motivate one another to actually keep doing it.

  17. #17
    Senior Member trackhub's Avatar
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    Where is Mister Data when you really need him?
    "The People will believe what the Media tells them they believe". George Orwell.

  18. #18
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Almost right. You were on the right track, but missed it by saying no hit on the circumference rim and rather, the launch Vehicle was going to get hit.. That was why I threw the hint to assume single stage, since the distance was only 700 meters covered.
    Quote Originally Posted by jgedwa View Post
    I am still confused by exactly what was described, but did I get it right nevertheless in some kind of way? Seems like I might have. jim
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  19. #19
    Can'tre Member 3alarmer's Avatar
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    Quote Originally Posted by Terrierman View Post
    No wonder everybody hates you.

  20. #20
    Senior Member jdon's Avatar
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    Quote Originally Posted by 3alarmer View Post
    So, can an airplane takeoff on a treadmill turning in the opposite direction and matched speeds?
    Quote Originally Posted by maddmaxx View Post
    How are you ever going to live in the real world if you can't get along with people who don't believe what your do?

  21. #21
    Can'tre Member 3alarmer's Avatar
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    Quote Originally Posted by jdon View Post
    So, can an airplane takeoff on a treadmill turning in the opposite direction and matched speeds?
    ...this is a classic trick question from the pilot's exam. VTOL, pal.
    Quote Originally Posted by Terrierman View Post
    No wonder everybody hates you.

  22. #22
    derailleurs are overrated bigbenaugust's Avatar
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    Quote Originally Posted by jdon View Post
    So, can an airplane takeoff on a treadmill turning in the opposite direction and matched speeds?
    So I needed a 777 for this gigantic treadmill I am building to test this...
    --Ben
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  23. #23
    Crispy Member ahsposo's Avatar
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    Quote Originally Posted by jdon View Post
    So, can an airplane takeoff on a treadmill turning in the opposite direction and matched speeds?
    And is it happening in a vacuum or under Congressional oversight?
    Quote Originally Posted by toddles View Post
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  24. #24
    on by skijor's Avatar
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    Quote Originally Posted by Tom Stormcrowe View Post
    As a Blue Star, even after you leave, if you leave in good standing, as staff, you'll retire with lifetime Ti. That's been policy for years and staff is not elegible.
    Just like Congress. Does loco also get free healthcare for the rest of his days?

    My guess was pie. Cuz the best answer is always pie.

  25. #25
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by ahsposo View Post
    And is it happening in a vacuum or under Congressional oversight?
    There's a difference?
    Jeff Wills

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