And the details of how you land probably have a lot more of an effect on the outcome than the small reduction in velocity you get from a perfectly timed jump. Terminal velocity for a skydiver is about kph. The upward acceleration caused by the jump would need to be sufficient to cancel out about kph of this Most people can survive a 40 kph impact with relatively little trauma. Also, note that the first thing that happens at 12 km is you pass out from oxygen deprivation. This is the 'Jumping in a falling elevator' problem in another guise.
See Mythbusters for a complete explanation. Myth Busted. If you are falling with a piece of debris then conservation of momentum is applicable as external force is absent. Gravitational force is an internal force. At the moment of jumping, velocity of the centre of mass of system will be unaffected by the fact that you jump off the debris.
The acceleration and velocity of the centre of mass will be same before and after the jump because the force that you push the debris with is internal and internal forces do not change the motion of Centre of mass.
If somehow you apply so much force that your velocity becomes zero and the gain in the velocity is such that the momentum is conserved then it is possible to survive a fall. If you are able to give the debris this velocity V' at the height H, then you will survive the fall if you jump at the right height and time because even after jumping earth will pull you.
So, if you jump too early then there will be enough height, on the course of which you will gain a lot of velocity before hitting the ground and all that velocity will be lost in a short interval of time, producing enormous impulse. The impulse would be so great that your body won't be able to withstand it. But physically, you cannot generate that much impulse by jumping on the debris.
If it were possible to generate that much impulse, even then it would have shattered your bones. The answer completely depends on the terminal velocity of the person and object s he is standing on and also on the athletic ability of the individual. To a first order, assume the mass of the object is much greater than the mass of the individual.
So if the terminal velocity were very slow, and the individual very athletic, and the individual's timing and trajectory very precise, just maybe. In the real world, no. And also would he be able to stand on the debris without so much of air pressure. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Learn more. Could somebody survive a fall by jumping off an object shortly before impacting? Asked 4 years, 8 months ago. Active 4 years, 5 months ago.
Viewed 23k times. Improve this question. Add a comment. Well, what is free falling, you ask? By the Newtonian definition, the moon itself is in free fall! Because the gravity of earth is the only force acting upon the moon.
Though not true free fall devices by this strict definition, we thought it would be impracticable to mount our devices in space or build giant vacuums for each installation. Head Rush's devices are the most authentic free fall you'll find in an adventure park on the planet Earth.
For those of you so inclined, feel free to dig further into the details of free fall physics and mathematics. Without the effects of air resistance, the speed of an object free falling toward Earth would increase by about 32 ft 9. Luckily for skydivers everywhere, they do experience resistance from the air as they fall, and because of that resistance, skydivers and any other object falling within Earth's atmosphere will reach a terminal velocity.
Terminal velocity is the fastest speed that an object will reach as it falls through the air. As a skydiver jumps, gravity pulls them towards the earth, accelerating their fall.
At the same time, air resistance is pushing back on them and increases at higher speeds. A skydiver's speed will continue to increase until the pull of gravity equals the air resistance pushing against them or until they deploy their parachute.
At this point, they will have reached terminal velocity and will fall at a constant speed, no longer accelerating. The mathematical equation to determine terminal velocity takes into account an object's mass, gravity's pull, the resistance provided by air or fluid, and the area of an object.
Enough math, though. Here are some fun free fall facts! As an equivalent, we can think in terms of height: how high was the elevator when it fell, and how high can you jump? Falling one storey 3m : timed right, you hit the ground as if you fell from 80cm. Falling three storeys 9m : you hit the ground as if you fell 4. Your predicament is upgraded from possibly dead to alive but injured. Some have suggested lying down in the lift, because it will distribute the force of impact over your whole body.
This is a terrible idea - protect your brain! Some part of your body must absorb the impact, but head injury is the primary cause of death in falls. Let your legs take the hit. Falling five storeys 15m : you hit the ground as if you fell 9 metres, which is the difference between probably dead and probably alive.
This is the crucial case, the difference between life and death. Good luck. Read more: Curious Kids: Why aren't birds pulled down by gravity while they're flying? I assumed that your timing is perfect, despite probably being unable to see the ground.
This Mythbusters episode showed that this is very difficult.
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