Eli5 why jumping off a plane last second doesn’t decrease Fall damage
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It does.
Problem is that what kills you is your own kinetic energy squishing your body, and the kinetic energy is equal to your mass multiplied by your speed squared. Of for ease, just use mass multiplied to speed and multiplied to speed again.
Kinetic energy= mass * speed squared.
Your fall: 75kg * (100m/s squared) = 750000 impact energy
Remove your leg powered jump of:
75kg 5m/s squared= 1875 (that’s assuming you can humanly jump that good, which no one can, but it’s a simple and generous number to use in an example)
You are left with 7498125 impact energy, that’s not gonna save you the slightest.
It works way better for slow impacts like jumping off any slower-falling vehicle.
Let’s say, a car falling at 10 m/s
assuming you are able to use all your leg power to propel you the opposite way,
it’s 75kg per 10 m/s squared= 7500,
remove your 1825 jump energy, you are left with a 5625 impact energy.
In this case it helps way more as you see.
It does.
Problem is that what kills you is your own kinetic energy squishing your body, and the kinetic energy is equal to your mass multiplied by your speed squared. Of for ease, just use mass multiplied to speed and multiplied to speed again.
Kinetic energy= mass * speed squared.
Your fall: 75kg * (100m/s squared) = 750000 impact energy
Remove your leg powered jump of:
75kg 5m/s squared= 1875 (that’s assuming you can humanly jump that good, which no one can, but it’s a simple and generous number to use in an example)
You are left with 7498125 impact energy, that’s not gonna save you the slightest.
It works way better for slow impacts like jumping off any slower-falling vehicle.
Let’s say, a car falling at 10 m/s
assuming you are able to use all your leg power to propel you the opposite way,
it’s 75kg per 10 m/s squared= 7500,
remove your 1825 jump energy, you are left with a 5625 impact energy.
In this case it helps way more as you see.
Apparently you can’t just answer with a link in this sub, so I’ll say again:
[Inertial reference frames!](https://m.youtube.com/watch?v=wD7C4V9smG4)
That channel has awesome science videos of all types, if you want to learn things about stuff.
Apparently you can’t just answer with a link in this sub, so I’ll say again:
[Inertial reference frames!](https://m.youtube.com/watch?v=wD7C4V9smG4)
That channel has awesome science videos of all types, if you want to learn things about stuff.
Because you’re just converting your relative velocity to global velocity. When you’re on the plane, your speed is the same as the falling plane. The 2 feet you jump up to get off doesn’t do much to counteract that. Jumping in the plane might make you weightless, but relative to the not moving earth, you haven’t actually changed your speed at all.
Combined with speed not actually having much to do with impact. Surviving a fall is more about how long you can keep your momentum going, so that it slowly decreases instead of stopping all at once. You’d have to juno out of the plane onto a hill that’s tall enough for you to roll for a good while. And that will probably kill you anyway.
You’d actually have better chances bracing in your seat.
Because you’re just converting your relative velocity to global velocity. When you’re on the plane, your speed is the same as the falling plane. The 2 feet you jump up to get off doesn’t do much to counteract that. Jumping in the plane might make you weightless, but relative to the not moving earth, you haven’t actually changed your speed at all.
Combined with speed not actually having much to do with impact. Surviving a fall is more about how long you can keep your momentum going, so that it slowly decreases instead of stopping all at once. You’d have to juno out of the plane onto a hill that’s tall enough for you to roll for a good while. And that will probably kill you anyway.
You’d actually have better chances bracing in your seat.
Well scientifically speaking, “fall damage” is a game mechanic, not a real life thing, but for the purposes of this conversation, it does, just not by much.
It is about the equivalent of putting up a sheet of fabric between you and a bullet shot at you. Yes, in a scientific sense, the fabric will slow the bullet down some. In a practical sense, it has no difference.
Well scientifically speaking, “fall damage” is a game mechanic, not a real life thing, but for the purposes of this conversation, it does, just not by much.
It is about the equivalent of putting up a sheet of fabric between you and a bullet shot at you. Yes, in a scientific sense, the fabric will slow the bullet down some. In a practical sense, it has no difference.
Your momentum relative to the plane will change, because you now jumped off the plane.
Your momentum relative to the ground is still falling at roughly the same speed as the plane.
To change your momentum relative to the ground in this situation, you would need to slow the plane’s descent down first, which, if you can do, you mighy wanna choose a softer form of crashing instead.
Your momentum relative to the plane will change, because you now jumped off the plane.
Your momentum relative to the ground is still falling at roughly the same speed as the plane.
To change your momentum relative to the ground in this situation, you would need to slow the plane’s descent down first, which, if you can do, you mighy wanna choose a softer form of crashing instead.
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