Notices
Results 1 to 7 of 7

Thread: science question

  1. #1 science question 
    New Member
    Join Date
    Apr 2012
    Posts
    3
    i am doing a science experiment with daughter, here is my question. we can move a magnet attached to a toy with another magnet. but why does it stop working when we strap both magnets to the toy?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Brassica oleracea Strange's Avatar
    Join Date
    Oct 2011
    Location
    喫茶店
    Posts
    16,911
    I'm not quite sure what you mean. Can you describe what you are doing in a bit more detail.

    What does "stop working" mean? What stops doing what? (Sorry if I am being dim...)


    ei incumbit probatio qui dicit, non qui negat
    Reply With Quote  
     

  4. #3  
    New Member
    Join Date
    Apr 2012
    Posts
    3
    Quote Originally Posted by Strange View Post
    I'm not quite sure what you mean. Can you describe what you are doing in a bit more detail.

    What does "stop working" mean? What stops doing what? (Sorry if I am being dim...)
    not at all, figured i didnt explain that well. basically we strap a magnet to a toy car, we can then push that toy with another magnet with the poles repelling power. But if we strap both magnets to the same toy with the two repelling poles within range (determined from when we held the one and it pushed the toy) the toy no longer moves
    Reply With Quote  
     

  5. #4  
    Administrator KALSTER's Avatar
    Join Date
    Sep 2007
    Location
    South Africa
    Posts
    8,231
    The forces cancel out. By strapping both to the toy, you effectively make them one with the toy. The toy won't move for the same reason that you pushing on the steering wheel doesn't move the car forward.
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

    "Gullibility kills" - Carl Sagan
    "All people know the same truth. Our lives consist of how we chose to distort it." - Harry Block
    "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
    Reply With Quote  
     

  6. #5  
    New Member
    Join Date
    Apr 2012
    Posts
    3
    Quote Originally Posted by KALSTER View Post
    The forces cancel out. By strapping both to the toy, you effectively make them one with the toy. The toy won't move for the same reason that you pushing on the steering wheel doesn't move the car forward.
    thanks. how about if we put something between the two magnets effectively making the toy have no magnets, then remove what is blocking the field, I guess the best thing for me to do is try it, lol in a lazy mood.
    Reply With Quote  
     

  7. #6  
    Administrator KALSTER's Avatar
    Join Date
    Sep 2007
    Location
    South Africa
    Posts
    8,231
    Still the same. Both are tied to the toy and each is pushing the other in opposite directions. Same reason you can't pick yourself up from the ground. There needs to be an external push that imparts momentum to the object.
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

    "Gullibility kills" - Carl Sagan
    "All people know the same truth. Our lives consist of how we chose to distort it." - Harry Block
    "It is the mark of an educated mind to be able to entertain a thought without accepting it." - Aristotle
    Reply With Quote  
     

  8. #7  
    Forum Ph.D.
    Join Date
    Jul 2011
    Posts
    984
    When you moved the car by pushing it with the repulsive force of the like poles of the magnets the motive force came from you pushing the car, not from the magnets. In terms of the net forces involved the magnets are irrelavent. It does not matter if you transmit force to the toy by pushing it with the repulsive magnetic force or by pushing it with a stick, the motive force is still coming from your muscles.
    Reply With Quote  
     

Similar Threads

  1. Help please! Science project question
    By meganruby in forum Chemistry
    Replies: 3
    Last Post: July 19th, 2011, 03:53 PM
  2. Question about computer science
    By tian314 in forum Computer Science
    Replies: 2
    Last Post: February 11th, 2009, 11:20 PM
  3. Science question
    By anna_blakemore in forum Mechanical, Structural and Chemical Engineering
    Replies: 17
    Last Post: May 23rd, 2008, 03:22 PM
  4. Political Science question . . .
    By charles brough in forum Behavior and Psychology
    Replies: 10
    Last Post: September 28th, 2006, 11:47 PM
  5. Basic field of science question
    By thechosendenton in forum General Discussion
    Replies: 1
    Last Post: July 18th, 2006, 02:09 AM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •