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Thread: Weight, Gravity?

  1. #1 Weight, Gravity? 
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    Dec 2007
    I'm completly new to science so I'm sorry if the vast majority of what I'm saying makes no sense. So I was hoping if you help me underdstand all thats wrong with my some of my confused thought process.

    Why is it that the weight of say a long metal pole( made entirily of same metal, material)(nothing ealse) always feels strongest at its ends. Is it that the weight of a part of something is relative to how far away it is from the entire bodies centre, or centre of gravity (whcih one) and also relative to you?/that is it's relative to disatnce in one of these ways.

    But if either of these are so. Then is the actual weight of that part changing or is it that one of these combinations of things makes another force or something stonger??? That pulls down on it more. Makes gravitiy stonger????

    Even if weight is changing, something must remain the same of which the new weight is bassed on in accordance with other possible things mentioned. That is a value in that part of the pole which is not the weight.
    However this doesnt make sense to me? I'm not sure? Please verify. I'm mean Does the weight remain the same?

    On a seasaw your weight has greatest effect at the ends. So is it then too, that gravity has greatest effect there? Or that you are naturally pushing down more because gravity is pulling down more on you there. Doesnt seem right. Confused Or is is it that a less of the seasaw is supporting you at ends?

    Another Seperate thing possibly.

    Why does an object falling straight down velocity accelerate? Is it because as the object gets closer to the earths core, the gravitation pull on it gets stronger. So it accelerates? Like when an astranout is on the moon and when they jump they fall gently and slowly because gravity is so weak there. And if you throw something, it seems to fall faster as it gets closer to ground. And also what are the forces at work here that determine how far it goes, speed, etc? And do they effect rate of acceleration in falling in negative way? :?

    Sorry if I wrote this badly and in a confusing way.

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  3. #2  
    Forum Masters Degree SuperNatendo's Avatar
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    Dec 2007
    Nashville, TN USA
    The Mass of the object stays the same regardless, but the extra leverage the length of the pole gives gravity makes it feel heavier

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  4. #3  
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    Dec 2007
    On a seesaw your weight has greatest effect due to simple physics equations.

    F=md where d is the distance from the pivot.
    On the earth the gravitational field strength is considered to be uniform close to the surface. Objects accelerate because gravity is providing a force.
    newtons second law F=Ma

    If a force is applied the object will accelerate
    Liberty is the souls right to breathe
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