Momentum vs Kinetic Energy - GCSE Physics Revision

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  • Опубликовано: 10 фев 2025
  • Short video using the idea of recoil to demonstrate the difference between Momentum and Kinetic Energy. GCSE Physics Revision.
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Комментарии • 20

  • @KitBetts-Masters
    @KitBetts-Masters  4 года назад

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  • @p199a
    @p199a 3 года назад

    amazing explanation thx dude

  • @mbburry4759
    @mbburry4759 4 года назад +2

    Where does the kinetic energy go?
    If there is an 80kg target that completely absorbs the bullet the momentum equation gives the target about 0.1 m/s velocity and .4 joules kinetic energy.
    What happens to the 1000+ joules of energy the projectile had on impact (assuming target absorbed it and the bullet didnt continue traveling past target)? Please help this make more sense - thank you

    • @KitBetts-Masters
      @KitBetts-Masters  4 года назад +2

      Imagine all the atoms of the target jiggling a bit more because of the impact energy. Also some of the energy has gone to changing the shape of the target, and heating it somewhat.

    • @KitBetts-Masters
      @KitBetts-Masters  4 года назад +1

      Sounds like you need my conservation of energy playlist on my channel homepage!

    • @harshvishwakarma239
      @harshvishwakarma239 4 года назад +2

      That energy is used in breaking , or plastically deforming the object , Producing heat , sound

  • @shaun2983
    @shaun2983 7 лет назад +2

    Is the surface area another reason why recoil doesn’t do damage compared to the bullet?

    • @KitBetts-Masters
      @KitBetts-Masters  7 лет назад +3

      Yes good point, that means that the pressure is lower for the force of the kick back, this will mean that the butt doesn't pierce the shoulder.

    • @stanpotter7764
      @stanpotter7764 4 года назад

      @Mario It doesn't. The force of the expanding gas from the gunpowder had force, which accelerated the bullet.

    • @stanpotter7764
      @stanpotter7764 4 года назад

      @Mario The bullet has momentum and most importantly when it comes to bullets, it has kinetic energy. Kinetic energy is the one true measure of a bullet's power. But as you noted, f=ma, and the bullet is not accelerating a mass, therefore it is not exerting force.

    • @stanpotter7764
      @stanpotter7764 4 года назад

      @Mario lol, ok Bruh.

  • @lomeranger
    @lomeranger 7 лет назад +1

    Would like to ask you a real world question. If you find this distasteful, please delete, ignore and I apologize. I am a hunter and I have consistently heard non academics say more mass in a projectile is better than less with equal KE, i.e. a bow shooting a heavier slower arrow vs the same bow shooting a faster and lighter arrow. Same force propelling projectile. Which arrow would travel through more watermelons?

    • @KitBetts-Masters
      @KitBetts-Masters  7 лет назад +2

      Jason Lome if same force then lighter projectile has a greater acceleration, therefore greater speed. Kinetic energy is proportional to mass, so double mass, double energy. But proportional to speed squared, so double speed, quadruple energy.
      So my hunch is lighter projectile, greater energy, more damage to target. There are other factors though! But I'm not sure how exactly they'd come into play. Good question.

    • @KitBetts-Masters
      @KitBetts-Masters  7 лет назад +1

      This might help understand! ruclips.net/video/D7OahLIBz_8/видео.html

    • @lomeranger
      @lomeranger 7 лет назад

      That is an excellent video but doesn't address my question. If you were to vary the mass of your bolt keeping its cross sectional area consistent, how far would it penetrate into a gelatinous cube.

    • @KitBetts-Masters
      @KitBetts-Masters  7 лет назад +1

      Did you read my other reply? I think that's your answer, do you have any way of measuring muzzle velocity?

    • @alanjones4358
      @alanjones4358 6 лет назад +3

      Jason Lome The heavier arrow would travel through more watermelons, assuming that it has the same KE and the same cross section, since the heavier arrow has more momentum at the same KE. Whether that's better or not depends on whether you want more watermelons damaged or more damage to each watermelon. And how important a flat trajectory is, since a slower heavier arrow will drop more over a given distance.
      Why would anyone find watermelon hunting distasteful?

  • @Layarion
    @Layarion 3 года назад

    but how is kinetic e diff from just e?

    • @djancak
      @djancak Год назад

      it's E but just the kinetic part

  • @OfficialMstar
    @OfficialMstar 5 лет назад

    interhigh?