All Questions
Tagged with collision estimation
46
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Rocket Exhaust Ground Impact: Exhaust Gas Velocity vs. Pressure
Thanks for anyone that can help.
Say we have a rocket engine in the vacuum of space with exhaust velocity of 2,000m/s or more, but low pressure exiting nozzle, say 1-2psi. A wider nozzle engineered ...
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2
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1
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2k
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If the oh-my-god particle hit you, would you notice?
I was reading about the 'OMG particle' and was wondering what would happen if it hit a person (before it went through the atmosphere). I did a search and most answers said you wouldn't notice. Which ...
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2
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How do you calculate the time taken in a collision?
For example a car with a known speed and mass crashes with a completely unyielding wall. The car has a crumple zone, (and you know the modulus of the crumple zone) so it doesn't stop immediately, but ...
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Calculating the damage done by a boxer's punch
I'm developing a VR boxing game and I'm curious about what would be the most accurate calculation to define a damage number for a boxer.
Right now I'm using Collision Response equation by putting ...
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Is it possible to shatter stone by dropping it into water from a significant height?
If you had a stone approximately 1 meter in height, 1.5 meters in length, and .75 meters in width, could you drop it from a height into a body of water and shatter, significantly crack, or otherwise ...
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Why does the opposing force differ in when falling on concrete vs on water in spite of Newton's third law?
If a person jumps from the first floor of a building and lands on a concrete surface, they will suffer serious injury because of Newton's third law.
If the same person jumps the same distance and ...
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3
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2
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384
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Would the collision of a neutron star and an anti-neutron star destroy the galaxy it happens in?
My question is a follow up to this one: Does the collision of a neutron and anti-neutron produce energy?.
Quoting from an answer:
"The collision of a neutron and antineutron star would initiate ...
- 885
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How can i calculate the compression or deformation of an object after a collision? [closed]
To be more precise about what I want to ask, will an object of 1 kg going at 10 m/s hitting another object of 1000 kg (at rest) have the same deformation as if we switch the velocities and the one of ...
user293241
2
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2
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290
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What would happen if a teaspoon of neutronium crashed through Earth's atmosphere? [duplicate]
Pretty self explanatory hypothetical. I realize this is probably an impossibility and maybe it'd be more likely to be hit by a small black hole or primordial black hole. I'm just curious, because we ...
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340
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Why is wingsuit water landing without opening a parachute not a survivable event?
According to this YT video, just before this wingsuit flyer opened his parachute his speed was below 90 KPH. When you jump off a 100 foot cliff your impact velocity is around 87 KPH and people have ...
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Possible to destroy matter on a "human" scale (i.e. $\mathcal{O}(1m)$) using a proton?
A naive calculation suggests that a proton moving in a vacuum at $(1-10^{-38})c$ would have relativistic momentum equal to $\gamma mv \approxeq 2\mathrm{kgms^{-1}}$ if we say $m = 10^{-27}\mathrm{kg}$ ...
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4
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1
answer
150
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How fast do I need to go to run on water? [duplicate]
Well I was reading this article and I got stuck in this particular line
because according to my calculations, the reaction of on my foot by the water should be $\rho A v^2 \sin^2\theta$. I am ...
- 608
1
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2
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413
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How much force applied to canal wall from that cargo ship given 220,000 tons and 12.8 knots?
In case you've been hiding under a rock, or are reading this in the future: "that cargo ship" is a huge story right now (3/26/2021). A brief summary: well basically a few days ago one of the ...
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84
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If you swing anything fast enough, can you nail a nail?
You have a nail set in a piece of wood for example. Theoretically if you swung something else at it, no matter what it was, could you drive the nail in, if it were moving fast enough. I get that the ...
-4
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1
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When does an object break?
We all know when I hit glass with a stone, the glass will shatter, the stone will most likely survive.
If I hit a rubber cube with the same stone, both would probably survive and I might get a stone ...
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