• jackeryjoo@lemmy.world
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    3 hours ago

    What is the velocity of each one?

    A slow moving bowling ball causes little to no damage.

    A marble fired at around half the speed of light might do some damage.

    • spooky2092@lemmy.blahaj.zone
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      2 hours ago

      How far are you from the source?

      A ways away, I’m not worried about the bowling ball, but that marble will fucking end you.

    • IndiBrony@lemmy.world
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      3 hours ago

      I mean, you cold just shove the marbles down your throat, but failing that… I know what it’s like to hope that someone pummels you to death with a bowling ball. I hope you don’t genuinely feel that way, but if you do, there are people here - myself included - who would be happy to offer advice to try and not feel that way, or at least provide some temporary relief from that feeling.

      And that goes to anyone else reading this who feels that way: no matter where you are in your head, there’s a way out of the darkness. Take it from someone who’s been there ❤️

  • db2@lemmy.world
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    7 hours ago

    If they’re being launched by the same spring mechanism you’re better off with the bowling ball than a little glass bullet.

    • redlemace@lemmy.world
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      7 hours ago

      Depends, how tight is the spring? At high velocity i’d guess a marble will penetrate the body, where at low velocity a marbel would be easier to stop

      • deranger@sh.itjust.works
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        6 hours ago

        I think they’ll both be exactly the same difficulty to stop due to conservation of energy. If the spring used is the same for both the bowling ball and the marble, the bowling ball is going to be going much, much slower than the marble.

        • JustAnotherKay@lemmy.world
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          4 hours ago

          This feels wrong to my brain. Something that is much heavier must take more energy to move, and therefore to stop. The same velocity doesn’t necessarily imply the same amount of kinetic energy right? Now I gotta go look this up or wait for someone to tell me why I’m stupid

          • deranger@sh.itjust.works
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            4 hours ago

            The spring imparts the same amount of energy to the marble and bowling ball. The two objects are not at the same velocity, the marble would be moving significantly faster.

            The same velocity doesn’t necessarily imply the same amount of kinetic energy right?

            Not at all.

            E = 1/2mv^2

            Since energy (E) is provided by the same spring in both cases, the energy of the bowling ball and the marble are equal. Since mass (m) is much higher for the bowling ball, the bowling ball’s velocity (v) must be significantly lower.

            • JustAnotherKay@lemmy.world
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              3 hours ago

              That’s why I’m stupid! End of shift sleepy brain forgot about the parent comment talking about the spring because of the confusion about velocity. Seems so silly to forget a piece of the conversation while I’m having it, but this happens a lot. I really oughta get an ADHD diagnosis lol

        • RmDebArc_5@sh.itjust.works
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          6 hours ago

          You also have to consider air resistance, that should reduce the energy of the bowling ball when hitting you, making it easier to stop

          • earphone843@sh.itjust.works
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            5 hours ago

            Friction would be way more of a determining factor than air resistance, assuming they’re traveling along the ground.

          • deranger@sh.itjust.works
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            5 hours ago

            Air resistance will affect the marble more since it’s traveling faster. I also feel like either mass (or more likely, density) of the object matters, which would advantage the bowling ball in this aspect too.

            Where are the physics nerds at, we need answers!

  • finitebanjo@lemmy.world
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    6 hours ago

    Is the relative force and distance the same for each? Are they rolled at you?

    The bowling ball has more friction so at the same force would be less when it reached you.

    • Zwiebel@feddit.org
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      5 hours ago

      The bowling ball has a lower friction to mass ratio and will therefore slow down less

      • finitebanjo@lemmy.world
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        4 hours ago

        Assuming perfect spheres there is similar or the same friction with the surface it rolls along for both and much larger air resistance for the bowling ball.

        Mass doesn’t matter because it is a component of Force which is initially equal for both. The acceleration and speed will be different for both to make forces equal.

        The bowling ball will lose more of the force than the marble regardless of which slows down faster.