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  1. No, when you tried to jump, the force driving against your mass would still be along the same vector. Of course, standing here in Earth gravity, it's difficult to pick up a fifty-pound bag of concrete and hold it out in front of you in rigid arms (or you were strong...

    4 Answers · Science & Mathematics · 19/02/2011

  2. See the best answer at the first reference. These sources can answer a lot of your questions, including various ways science is done, and how to get help. It's much easier to get help when you demonstrate that...

    2 Answers · Science & Mathematics · 15/01/2013

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