A Mistake 99% Badminton Stores Are Making

Discussion in 'Market Place' started by magiadam, Apr 12, 2008.

Thread Status:
Not open for further replies.
  1. magiadam

    magiadam Regular Member

    Joined:
    Nov 27, 2005
    Messages:
    80
    Likes Received:
    0
    Location:
    Montreal, Quebec, Canada
    Whenever they describe the weight of the racket, it is described with a unit of 'Grams' or 'Lbs', when it should be expressed with a unit of 'Newtons' since they're talking about the weight technically. They should express the racket's mass properly.

    Just a thought XD
     
  2. Tsumaranai

    Tsumaranai Regular Member

    Joined:
    Apr 1, 2006
    Messages:
    800
    Likes Received:
    1
    Occupation:
    Student
    Location:
    In your mind
    Um.., mass is not the same as weight. Weight is relative to gravity, and will be what you feel. Mass is the measurement of the amount of matter. Also, mass is expressed in grams...
     
  3. magiadam

    magiadam Regular Member

    Joined:
    Nov 27, 2005
    Messages:
    80
    Likes Received:
    0
    Location:
    Montreal, Quebec, Canada
    But my point is, if they express in Weight, they must use a unit of force, such as Newtons.
     
  4. Tsumaranai

    Tsumaranai Regular Member

    Joined:
    Apr 1, 2006
    Messages:
    800
    Likes Received:
    1
    Occupation:
    Student
    Location:
    In your mind
    But they're not... They're measuring the mass.
     
  5. magiadam

    magiadam Regular Member

    Joined:
    Nov 27, 2005
    Messages:
    80
    Likes Received:
    0
    Location:
    Montreal, Quebec, Canada
    Then it should be:

    "Mass: XXX Kg"

    instead of

    "Weight: XXX Kg"
     
  6. jerby

    jerby Regular Member

    Joined:
    Sep 3, 2005
    Messages:
    4,123
    Likes Received:
    32
    Location:
    EU
    weight is a force, and indeed has the unit of newtons.
    Mass however is an (extensive?) property, and has a unit of grams or pounds.

    Also, just for poops and giggles... weight is not only dependend of the gravity, it is depended on all the forces acting on the object.
    a 5kg table is acting on the floor with a weight of roughly 50N, whent he table is left standing. but when I lean on it with a 100N force the table is acting on the floor with a weight of 150N.

    But it's such a common misconception everybody knows what is meant...
    Our site happily states weight :p

    (I guess this removes any doubt people had I was a geek, now they know for sure ;))
     
  7. Fidget

    Fidget Regular Member

    Joined:
    Mar 4, 2008
    Messages:
    3,664
    Likes Received:
    330
    Location:
    Canada
    Force is mass times acceleration. (kg*m/s2)

    If you consider that the earth is pulling the racquet's mass at all times downward, I guess you could certainly describe it in Newtons....and that would be handy... when?

    You: "Hey doc, my buddy dropped his 0.090kg racket on my head at 9.8m/s2 meaning I sustained a 0.882 Newton force to my forehead."
    ER doc [busy stitching] "Mm, thanks for that Sport. Now just sit still, that's a good lad."
     
  8. Tsumaranai

    Tsumaranai Regular Member

    Joined:
    Apr 1, 2006
    Messages:
    800
    Likes Received:
    1
    Occupation:
    Student
    Location:
    In your mind
    Now there's the argument you were going for.

    Well, we're talking about "empty" weight, without other forces acting on the object besides gravity. Of course, that's not technically weight. Weight is one property, while another force is not considered the weight, as it is the addition of the weight of another object while there is also work being done on the object if you were to lean on it.
     
    #8 Tsumaranai, Apr 12, 2008
    Last edited: Apr 12, 2008
  9. Fidget

    Fidget Regular Member

    Joined:
    Mar 4, 2008
    Messages:
    3,664
    Likes Received:
    330
    Location:
    Canada
    That's as clear as mud:)
    Simply put, the weight is the force the Earth has on an object's mass.
     
  10. cooler

    cooler Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    21,811
    Likes Received:
    23
    Occupation:
    Surfing, reading fan mails:D, Dilithium Crystal hu
    Location:
    Basement Boiler Room
    u must be a newton fan:p
     
  11. Fidget

    Fidget Regular Member

    Joined:
    Mar 4, 2008
    Messages:
    3,664
    Likes Received:
    330
    Location:
    Canada
    Me too. I loved her in 'Grease'!
     
  12. cooler

    cooler Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    21,811
    Likes Received:
    23
    Occupation:
    Surfing, reading fan mails:D, Dilithium Crystal hu
    Location:
    Basement Boiler Room
    oh? i thot she's a neutron bomb:D
     
  13. jerby

    jerby Regular Member

    Joined:
    Sep 3, 2005
    Messages:
    4,123
    Likes Received:
    32
    Location:
    EU
    weight is the force than one body acts on another (a rock lying on a table outs weight on the table)
    the force the earth has on an object is called gravity
    ;)
     
  14. Pete LSD

    Pete LSD Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    6,297
    Likes Received:
    13
    Occupation:
    Soul Searching
    Location:
    Canada
    Long lived Newtonian mechanics :)!!!
     
  15. Fidget

    Fidget Regular Member

    Joined:
    Mar 4, 2008
    Messages:
    3,664
    Likes Received:
    330
    Location:
    Canada
    Thanks Jerby. I stand corrected.:eek:
    Who would have thunk that BC could be so educational?
     
  16. Tsumaranai

    Tsumaranai Regular Member

    Joined:
    Apr 1, 2006
    Messages:
    800
    Likes Received:
    1
    Occupation:
    Student
    Location:
    In your mind
    Ok, well, to clarify: The "weight" weight of an object is generally considered to be just the object and the force of gravity upon the object. If you were to lean on a table, you are not merely placing your weight and adding to the force the table is exerting on the ground. You would be imparting energy and thus doing work. You would first have to calculate work before you add that additional force. If you placed a book upon a table, I would not call that the weight of the table. I would say that there's the weight of the table and the weight of the book, or else the weight of the table in addition to the force exerted by the book upon the table. I wouldn't combine individual weights to be considered as a number that represents both objects, such as was done with the table and the leaning.
     
  17. cooler

    cooler Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    21,811
    Likes Received:
    23
    Occupation:
    Surfing, reading fan mails:D, Dilithium Crystal hu
    Location:
    Basement Boiler Room
    i believe in a newtonian world, both reference objects of mass are attracting to each other. ie, the racket mass is pulling onto earth's mass too.
     
  18. Pete LSD

    Pete LSD Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    6,297
    Likes Received:
    13
    Occupation:
    Soul Searching
    Location:
    Canada
    There is certainly potential energy with the person placing his weight on the table. If the person's feet slipped and fell (PK his/her face on the table), the drop in height is the change in potential energy translated into kinetic energy. Ouuuccchhhh, what a painful way to experiment with Newtonian mechanics :D.
     
  19. Pete LSD

    Pete LSD Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    6,297
    Likes Received:
    13
    Occupation:
    Soul Searching
    Location:
    Canada
    Yes and the Earth's mass is just overwhelmingly huge :D.

     
  20. cooler

    cooler Regular Member

    Joined:
    Apr 25, 2002
    Messages:
    21,811
    Likes Received:
    23
    Occupation:
    Surfing, reading fan mails:D, Dilithium Crystal hu
    Location:
    Basement Boiler Room
    that is why it is better and simplier to express the racket in gram, not in newton.:D
     
Thread Status:
Not open for further replies.

Share This Page