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Monday, October 29, 2012

Rolling Marbles

Five friends built a marble tower.  The marble tower had a curved track.  The track was designed so that the marbles would move down the track in a circular path.  The track ended on the floor.  Each friend predicted how she thought the marble would move when it rolled off the end of the track onto the floor.  This is what they said:

Mrs. Demeris: "I think it will roll in circles."
Mrs. White: I think it will curve for a bit and then straighten out."
Dr. Coolidge: "I think it will roll in one big curve"
Mrs. Juan: "I think it will roll in a straight line"
Mrs. Charles: " I think it will zig-zag for a little while"

Which friend do you think is right?  Look for evidence online OR by doing some investigating at home.  You will be given tickets for right answers by Friday.  Answers must be complete and have some evidence in order to receive the tickets. 

106 comments:

  1. I agree with Mrs.Demeris

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    1. I disagre it wount keep spining just because it was.

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  2. I think Mrs. Juan was right because I looked it up on Wiki Answers. It said that when a marble rolls down a track it goes in a straight line until it stops. Also I had a ball tower that I used to roll things down all the time and the ball would go straight every time.

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    1. I agree.
      Iv'e done this before in the past it whent straight line.. that was what mrs.Juan said... I also visited wiki awnsers! it said the same thing...I don't think it will curl agaibn becuase theres no more of thetrack left mening it could circle around.Also I don't think it whent zigzag becuase it never did in the first place and it would be hard for the marble to do that without it hitting something.
      I dont think it will curve then straghten out heres why: Its not going to curve without the track it can't really just chang what its doing..especially because its curving .. so thats why i picked Mrs.Juan

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    2. sorry.. theres a lot of typos like : again,the track,meaning,change
      oh , I forgot to capitolize that "i"

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    3. I agree because I did this experiment at home and got the same thing. I knew it would not go in 1 big curve because with the track strait or not strait it will not curve.

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    4. I think Mrs.Juan is correct also because without hitting something the marble can't go zig-zag, and without a curving track it won't curve. Without something circular to roll on it will not roll in circles, so it will roll in a straight line.

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    5. I also agree with Carolina, Hannah, and Aidan because when i was younger I always played with different kinds of ramps and all the things that I roll down in the ramp would just keep going straight. So i agree with Mrs. Juan that the marble will keep rolling straight. Also I searched up on wikipedia and it said that the marble would keep going straight until it stops.

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    6. I know I commented below but I agree with Carolina.

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    7. I agree with Michael.

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    8. I agree that it is Mrs. Juan because i did a experiment and i also look it up and it said it will go in a start line and when i did my experiment thats what it did

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    9. Before I searched it up i agreed with Mrs.white but then it said that when it goes on the floor the marble will roll straight so Mrs.Juan was right.

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    10. I think Mrs. White is right because I did the experiment myself and it started curving then went straight. I think this might have happened because I used a small bouncy ball, but I highly doubt it.

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  3. I am not sure if it will go straight or curve then straighten out. Both seem like they would work, because once the marble leaves the ramp it might be forced the direction it was going and then straighten. But it could just go straight right as shoots out that could occur because maybe the only reason it was turning in the first place was its was on a track which was causing it to turn certain ways but as soon as it gets off it can go its on direction because nothing is controlling it.

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    1. I know. It is confusing. But since it come out from a turn it will curve slightly

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  4. I agree with Mrs. Juan because like Micheal said on wiki it said that it would go in a strait line. And I rolled a marble off a track and it went in a strait line.

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  5. I also think that Mrs. Juan is correct because I went on www.wikispace.com (resource) and it said the marble will travel in a straight path.

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  6. I think Mrs.Juan is correct and that the marble will roll in a straight line because I have this old boardgame and there is a curved marble tower so i actually did the experiment and the marble rolled in a straight line

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    1. I agree with you it will go straight. :)

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  7. I think that Mrs Juan is right I think that the marble will roll straight because if its rolling in circles then it rolls off of the track and nothing is there to support it in that case it will roll straight.

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  8. I think Mrs. Juan is correct because since the track is curved the marble will be forced in the direction that the track lets it out. My resource was Wiki answsers.

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  9. I agree with Ms Juan becuse I did the eperiment whith conects and the ball roled strait after leaving the track.Thats why I also agree with JM,IZZY,REMI,MOLLY,ASHLEY,and MICHAEL.

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  10. I think that Mrs. Juan is correct. I did this investigation at home and the ball went in a straight line. When it gets off the circle track thing it'll go straight because there are no forces making do anything else.

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    1. I agree with Noah because I did this experiment at home and it did go straight

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    2. I agree with Noah too because I did the experiment at home and it did not curve or do any zigzag when it got on the floor. It went straight.

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  11. I did some research on google and I think that Mrs. White is right because if it is a spinny tower after the marble gets off the tower it is still going to spin for a little then straighten out

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    1. I agree because if the marble spins around the track it will get rotation from spinning so much, then because it has no support at the bottom it will turn slightly ten straighten out.

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    2. I dont agre it doesent mean that it will keep going in a circul because it was.

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  12. I think thet MRS.Juan is right because if the tower goes in circles,the marble is going to go along those circles untill it hits the ground, and THEN it will go straight.

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  13. I think Mrs. Juan is correct. When I googled it, it said the marble would go straight.

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  14. Sorry, I think Mrs. White is correct because since the track is circular, the marble will curve a little bit. As it moves, it will straighten out.

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  15. Good, but i am still not shure if MRS.Juan is correct, i personally think it will go straight,(and another example of this is, i think a hotwheel going down a curved track).

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  16. I think that Mrs.Juan is right because I tested it out,and a marble woulden't roll in circles or go zig zag.If the track was curved when it was done rolling it would come out straight,and fall down when it was done rolling.

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  17. I think Mrs. Juan is correct because after the marble gets of the curved track it will go straight because of the end piece, which is straight. Also wiki.answers said the same thing.

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  18. I think Mrs. Jaun was correct because if the mable rolls of the track it will keep going strait.

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  19. I think Mrs. Juan is correct because after the marble gets of the curved track it will go straight because it will maintain the direction of the last piece of the track.

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    1. I think the same thing.

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    2. Umm... the last track piece is a turn. Not a straight one

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    3. Then how will it land? it has to have a straight line to land.Dan in my opinion, you sir are totally right.

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  20. It looks like Mrs. Juan is correct because the marble will end up straight after it took off the track. It wouldn't go in circles or neither go in a curve because there wouldn't be any force to push the marble. One of my cousins has a curved ramp and raced a car(not controlled) down and it end going straight like the marble does. Like the car, it has no force to make it go into another direction.

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    1. I agree with you, Meggie. I looked it up on wiki answers and I remember I used to play with a game that had a slide and a marble and I remember that it always went straight. I also asked a few relatives.

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    2. Ok, I looked that Mrs. Charles said that wiki answers was not a reliable source. So forget what I said about wiki answers!

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  21. I think that Mrs.Juan was right because it dosent make sense that it gose in a circul or curves just because it spins does not mean it will keep spining.

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  22. I think Mrs. White is correct because on the track, there has to be some width for the ball to roll around. If there was no width, then Mrs. Juan would be correct

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  23. I think Mrs. Juan is correct even though it was going in a circles I dont think that it would keep rolling in circles.

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  24. Remember wiki answers is not a reliable source. Try to fid it some where else.

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  25. I think Mrs.Juan is correct because it will go in a straight line even if it curved a little bit it will still go in a straight line the rest of the way.

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  26. I think Mrs. Juan is right because it's coming out strait so it will go strait

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  27. I agree with Mrs.Juan. I tested it out on my brothers old race car tracks and the marble went in a sraight line. Also to make sure my answer was right I looked it up on wiki answers and it had the same answer.

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  28. Anyways it would go in a sraight line anyways because it is coming out straight.Also I googled it just to double,double check.

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  29. I think that the answer is mrs Juan because I played a marble tower game with my brother and when the marble went out the end it went strait because it was going strait.

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  30. I think Mrs.Juan is correct because the ending piece is straight and because I watched several different videos on YouTube and they all ended up going straight.

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  31. I think Mrs.Juan is correct beacuse I tried rolling a car down my little brothers race car track and the car moved straight ahead.When you think of a diagram there is nothing to move the marble in a curve.

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    1. I also think that Mrs.Juan is right because the marble was being pulled down by gravity in circles because of the curves and at the end it ends up going straight because there is nothing left to make it curve. I know this because in my house there is a sort of gumball machine that makes it go around in circles but ends up going straight.

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  32. http://www.knikkerbaan.nl/marble-run-parts-lifters/ This is where i found my answers to conclude that Mrs.Jaun was right, because it will always end straight.It will only go circular, or zigzag if something guides.

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  33. I think Mrs.Juan is correct because U used my brothers hot wheel track and the ball zigzags for a few seconds but overall it always went in a strait line. I tried looking things up on Google,You tube and ask and I could not find anything. Overall the ball went in a strait line.

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  34. I think mrs.jaun is right becase balls ussaly go in that direction if you do it that way.I used to play with TAMAS AND THE FRIENDS train kit and when i did it on aramp it went straight down.

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    1. I agree Daniel O. but I did my brothers cars not Tomas. I put it on my brothers ramp and it went straight. So I think it's Mrs Juan

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  35. I think it is Mrs.Juan because if you put it in the middle of the road it will always go into a straight line.Also I tried it with my brothers hotwheel whatever you call it thing and it went into a straight line. I also could not find ANY recources.

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  36. i think mrs white is write because i went on google images and sasw that the race track is curly and then straight so i think it is mrs white

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  37. I think mrs White is right because I saw videos that show a marble curve and then straten out before it stops

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  38. I agree with MRS.JUAN i think the ball will roll in a straight line

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    1. Oh and I looked it on on youtube

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  39. I think Mrs. Juan is right because I went on answers and it told me that plus I went on youtube and watched a video and it went straight line.

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  40. I think Mrs.White is correct because it's a curved track and when it's on the track it will curve. When it gets off the track it's not curved anymore so it goes straight.

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  41. I think Mrs. Juan is correct because no matter the shape of the track, it will roll in a strait line once it exits the track. Like we've been talking about in science, the only forces that would be acting against the ball are friction (which is acting as a resisting factor), and gravity (which is pulling the ball toward earth). Neither of these two forces would pull or push the ball side to side, make it curve, or even make it go in circles. Oh yeah, I tested it out at home too:)

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  42. mrs white is correct on this one because first of all the hot wheels track is in circles all the way down and when it comes out it will curve a little then straiten out but i have never played with a hot wheels track in A while...... so my answer is with mrs white............... anyone disagree?

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  43. I think mrs juan is correct because the hot wheels track is curving but that does not mean it will keep on curving it means that the end is straight so the ball wont curve around [unless someone adds a force to it] but mrs juan is right.

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  44. I think mrs. Jaun is right because it shoots the marble out of the rolly track thing.

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    1. I tried it out and that is what happened. I dont know if that is usual or not. I agree with you Syonn.

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  45. I think Mrs. Juan is correct because the ball is not spinning like the earth.The ball is spinning like the tires on a car. That proves that Mrs. Juan is right!!

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  46. it depends, if it ends curving, ends straight, or on a carpet, so i think Mrs.juan is right because it'll go straight because the end piece.

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  47. I think Mrs.Juan is right because the track is curved and gravity and the force will push the marbel to go in the direction the track is shaped.I found my answers on Wiki.

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  48. I think Mrs.Juan is correct because when the ball goes off the track there are no other forces making the ball go in a different direction.

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  49. I think Mrs.Juan is right. Because gravity is pushing them marble down, friction is slowing it down, and it might not have enough time to make a huge curve. And I don't know how it could just zig-zag...

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    1. Mrs. White is right because when it hits the gound it will spin for a little then straiten out

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  50. I think Mrs.White is correct because when the marble is going down the comtraption
    it's momentum is making the marble circle so when Mrs.White said that it would curve and go straight
    the straight part is when the circeling momentum stops and makes the marble go straight .

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  52. i think it will go in a straight line because when it comes off it there is to sides to make it stay on track and it will go straight

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  53. I think Dr. Coolidge is right because when the marble comes off of the curved track it is still in the spinning movement for a few seconds.

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  54. Yeah, i think that mrs.White is right because i used to try this when i was little and it allways just curved a little and then stopped.

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  55. I think Mrs Juan is right. On the track it will go in circles but after it gets to the floor the marble won't keep going in circles, it will go straight.

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  56. I think it mrs. white because the actual track is like that.

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  57. I think Mrs.Juan is corrct because my sister has a small gumball mechine. The gum rolls out on her desk but, it goes stright. Go Mrs Juan!!!


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  58. I think that the awnser is miss Juan because i took a marbel and curved it around and then saw if it went straight or not and i went straight. I choose Mrs Juan

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  59. I tried it and I say that Mrs. Juan was right because my ball went straight.

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  60. I believe Mrs. White is right, because the marble is used to be going in a big circle, once it realizes that there is no more track around it, the marble will straighten out.

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  61. I agree with you Fay because I looked it up on Wikipedia and it said that the marble will go in a straight line and I tried it out with my ball and it went in a straight line so the answer is Mrs. Juan.

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  62. I believe that Mrs.Juan is right because it was the most understandable,and the another reason is because when you roll a marble down a ramp correctly, it will most likely go straight.

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  63. I think Mrs.Jaun is corect because I went to wiki and it said the same thing. I have also done this before and it stays in the same direction unless it hits something.

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  64. I believe that Mrs. Juan is correct because I used my old marble track and when It came of the track it rolled in a straight line. This question includes physics. It's all on Newton's first law. The wall of the track is the unbalanced force acting upon the marble. When the marble is coming off the track the wall isn't acting on it any more so therefore, the marble will go in a straight line.

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  65. I think it is Ms. White because the track is circular and when the balls are going in circles and come off the track they will be going in a circular motion and then go straight.

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  66. I think Mrs.Juan is correct because If marble hit something it go ather way but it didnt hit something so it go straight.

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  67. I think Mrs. Juan is correct because I have tried this experiment various times before. The marble will only end up in a straight line. It cannot end up anywhere else. The end of the track can't be curved at the end. It has to be straight.

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  68. i agree with jackson because when the marble goes off it wont be going in circle it has to be straight and i decided to do the same experiment but a little different and mrs.jaun is correct

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  69. i agree with mrs.Juan because when it falls off the track theres no curve left. Therefore, it can't go any other way.

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  70. I think it is Mrs.Juan because when it goes off, the end of the track is a straight line so that means the marble will roll in a straight line.

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  71. I think Mrs.Charles answer is correct because marbles can not stay in a strait line after being moved.

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  72. I think mrs Juan is right because it doesnt matter if it curved before it will go forward anyway

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  73. I think mrs juan is right because the marble will roll straight

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  74. I think Mrs.Juan is right.Because I tried it at home 3 times the marble will go straight alwalys No matter what.

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  75. I think Mrs.Juan is correct because there is no track to make it curve so it will keep rolling in a stright line.

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