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.
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