Is it possible to jump so high

that you hurt yourself landing? Massive foot-floor coordination fuckups aside, is it possible to amass such velocity on the way back down from a vertical leap that you're sure to do yourself injury? Obviously not on Earth, but what about in lower-gravity situations?

Your landing velocity will equal your takeoff velocity no matter what acceleration due to gravity is.

That being said, the impulse is more the determining factor in injury.

If you hurt yourself during landing, then you must hurt yourself also during the jumping.

Well, not if you jump on one foot and land on another which is already weakened from a sprain or the like.  Have fun worsening the problem.

only if you don't know how the fuck to land properly.  I've seen someone go off the side of one of those folded up giant stacks of bleachers at the side of my high school gymnaseum (approx 20 feet up) with not much ill effect.

You can jump up in the air and roll over at the same time, if you apply enough rotational force your face will smack into the floor generating substantial pain.

>>6
You mean....


DO A BARREL ROLL?

That depends on the strength of your bones. Young, middle-aged, old?  There are certain medical conditions that cause your bones to become fragile. Is there air? Air-resistance?  Spread-eagle, or on your feet?  Landing on water, rock, or typical low gravity asteroid of some rock, but mostly powder/dust? Naked, or in a suit? Which bone? Foot? Leg? Back? Arm? Landing straight-legged, or landing to absorb as much of the impact as you can?

>>5
That's not the way back down from a vertical leap. That's falling off bleachers.

>>8
ITT we engage in pedantry to hide our inability to answer the question.

>>8
If it's pedantry you want, the strength of your bones, the age, the air resistance, and the gravity wouldn't matter in the slightest, for reasons that have already been pointed out in this thread. You'd hurt yourself jumping up just as much as you would landing.

>>10
Unless you landed differently from how you jumped. If I bend my knees while jumping, then (attempt to) keep them straight while landing, I may injure them in the landing without doing so during the jump.

>>9

So you are saying someone can jump so high such as to reach the top of those bleachers in a single bound?

well if your legs are strong enough to jump high then they should be strong enough to withstand the landing...in theory at least, a trampoline would probably add some height and pain

>>13
>>11

This is a retarded question, and this thread is full of fail. Better topics must come around.

>>12
Depends on gravity, obviously. Unless they can jump that high, this bleacher shit is off topic.

Whether you hurt yourself on landing or not depends on the maximum amount of kinetic energy transferred per second and the area in which it is transferred.

A good jump is 0.5 metres. An average person weighs about 80 kilos. The most sensitive area to strain is the hip joint which is at most a 0.05m diameter circle. The length the leg extends during a jump is about 0.9 metres from kneeling after which there is no additional force applied.

g = 9.8
s (distance jumped)= 0.5
m = 80
a (area) = 0.00196
l (length of leg extension)= 0.9

From the force per area we can calculate the compressive stress on the hip joint. From the total kinetic energy (Ek) generated we can calculate the constant force (F) over 0.9 metres needed to propel a 80 kilo mass 0.5 metres.

compressive stress = F/0.00196
F = Ek/l
Ek = 0.5mv^2
v^2 = u^2 + 2gs = 9.8
Ek = 392
F = 436
compressive stress = 222000 newtons per metre squared
compressive stress = 22.2 newtons per centimetre squared

The simplified equation...
compressive stress = gsm/10000al

velocity upon landing = velocity upon jumping...  so long as the landing is on the same surface as the jumping.  stupid question.