How can you be sure that F = ma?

How can you be sure that F = ma?

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  1. 2 years ago
    Anonymous

    F is respects you pay ma is your mom

    respect your mother son it can only make you a better man

    frick your dumb thread

  2. 2 years ago
    Anonymous

    look up the base units for newtons, it's shocking

  3. 2 years ago
    Anonymous

    It's made up. It's made up in a way that makes it true by definition. That's how.

  4. 2 years ago
    Anonymous

    Experiment dumbass.
    get a bunch of projectiles, ideally half of them all the same shape and weight, but some can be of a standard weight but different sizes. Then fire them into objects of a standard weight at different speeds. You will need some sort of launch device that can ensure consistency of force and speed (since the same weight ensures the mass is identical). Then see if the effects are the same.
    If there are discrepancies, see if angle or humidity or air temperature can account for it. If not, see if loss to other forms of energy like sound, heat, or even light can account for it. If you have absolute proof that this is not the case, that either mass has disappeared or force has increased, then you get to rewrite the laws of physics and thermodynamics.

    • 2 years ago
      Anonymous

      >Experiment dumbass.

      What if in fact F=map, where p is a constant close enough to one noone has identified it?

      • 2 years ago
        Anonymous

        That's why you should experiment and find out

      • 2 years ago
        Anonymous

        reminds me of this passage in Jackson electrodynamics.

      • 2 years ago
        Anonymous

        then we would have figured this out long ago. fact: newton didnt know that p=1, and the language of the 2nd law in "principia" allows for it to be anything. of course, its obviously fricking 1 now that the law has been scrutinized for 300 years.

        • 2 years ago
          Anonymous

          >Experiment dumbass.

          What if in fact F=map, where p is a constant close enough to one noone has identified it?

          You're both brainlets for failing to notice that the mysterious p would be subsumed by the m in any case.

  5. 2 years ago
    Anonymous

    >how can we be sure a derived quantity is derived?

  6. 2 years ago
    Anonymous

    Go scream "I hate Black folk" in the middle of detroit and you'll find out

  7. 2 years ago
    Anonymous

    >make experiment
    >hm it sure looks like f=ma

  8. 2 years ago
    Anonymous

    because a = F/m

  9. 2 years ago
    Anonymous

    it isn’t. it might be 99.99999% or more but [math]F[/math] will never exactly equal [math]ma[/math] because of Einstein’s theory of general relativity. The only [math]mathit{truly}[/math] exact equation in physics is [math]e = mc^2[/math]… also due to Albert Einstein.

    • 2 years ago
      h

      I'm not going to mock your lack of intelligence, bud. I think you've done this already. But F = ma is a definition and you're clearly mixing it up with another issue, that is that the gravitational pull is identical to F or that ma = mg

  10. 2 years ago
    Anonymous

    by the scientific method, which critically include experiment and observation
    it appears to be a very good model.
    never mistake a model for truth, though. it works within a range of validity, and if you exceed that range you exceed what the model is capable of describing.
    refinements of the model should closely reproduce the original model under the original range of validity.

    for example, F = ma works real well, but galaxies' motion is all fricky. dark matter seems to be the likely reason, but a less likely although conceivable reason is that Newton's 2nd law is really more complicated.

    this applies to all of physics

  11. 2 years ago
    Anonymous

    A better question is how can you know that "force" is even a real thing. Always seemed like a mathematical artifact to me.

  12. 2 years ago
    Anonymous

    Frick = My Ass

  13. 2 years ago
    Anonymous

    force isn't real.
    Why do you think people who talk about ballistics use the term energy and not force?
    It's an outdated model of things

  14. 2 years ago
    Anonymous

    Of course it is true, you could list any number of SI units in combination and give it a letter and fancy name. The unit might be useless but there is nothing to prove. newtons are just a practical way to not add separate mass and acceleration individually.

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