[shitfly]

Originally Posted by scorpion9 ↗

It's not apples and oranges. My first comment said that the mass doesn't matter in that case, velocity/acceleration does. Getting hit with that steel rim the way he did, is roughly equal to the guy standing on top of the truck, and falling down headfirst on top of the steel rim. In both cases...injuries would be severe, and he could break his neck. That's also why simply losing your balance, and falling head first onto the pavement is so dangerous...it doesn't look as bad as the scenario in this video...but it isn't far off. You literally get hit in the face with a planet.

Momentum is what matters, which is dependant on mass and velocity.

[gimlet]

Originally Posted by wrex1 ↗

Well I'll be a shit covered dick....no getting a round that

[scorpion9]

Originally Posted by shitfly ↗

Momentum is what matters, which is dependant on mass and velocity.

Not really,

Acceleration/deceleration matters in the end. If you get hit by a car going 50 miles an hour, you will end up a bloody mess.

If you get hit by a cargo train, 100 times more massive, going at 3 miles an hour...you may walk away with no injuries at all(even though it has an order of magnitude greater momentum). The train will just push you away.

[shitfly]

Originally Posted by scorpion9 ↗

Not really,

Acceleration/deceleration matters in the end. If you get hit by a car going 50 miles an hour, you will end up a bloody mess.

If you get hit by a cargo train, 100 times more massive, going at 3 miles an hour...you may walk away with no injuries at all(even though it has an order of magnitude greater momentum). The train will just push you away.

That's the thing, you keep illustrating scenarios where within a tiny fraction of either end of the probability spectrum, the result is measured as proof that you're right.

The rim isn't moving along a set of tracks at 3 mph. It isn't a car going 50 mph into another identical car full of screaming infants. It's a gd heavy wheel falling off a platform. It isn't falling straight down. There are other forces at work here, as it tilts forward and falls the bottom is on the platform, which creates swing. This multiplies the force of the "hammer" end of the wheel.

Speed/acceleration are inconsequential as there is not much needed to create enough momentum to cause devastating injuries. Possibly more than "3 miles per hour", but not much....

[hughjardon67]

Originally Posted by shitfly ↗

That's the thing, you keep illustrating scenarios where within a tiny fraction of either end of the probability spectrum, the result is measured as proof that you're right.

The rim isn't moving along a set of tracks at 3 mph. It isn't a car going 50 mph into another identical car full of screaming infants. It's a gd heavy wheel falling off a platform. It isn't falling straight down. There are other forces at work here, as it tilts forward and falls the bottom is on the platform, which creates swing. This multiplies the force of the "hammer" end of the wheel.

Speed/acceleration are inconsequential as there is not much needed to create enough momentum to cause devastating injuries. Possibly more than "3 miles per hour", but not much....

I'm guessing that rim hit him at a bit more than 3 miles per hour, so one of you geniuses please do the math FFS...these nincompoops spewing all this physics mumbo-jumbo has me curious now.

[shitfly]

Originally Posted by hughjardon67 ↗

one of you geniuses please do the math FFS...

I don't have a clue what I'm talking about. I just talk a lot of shit.

[gimlet]

Originally Posted by scorpion9 ↗

You should go to school and learn physics then.
In basic relativity, it doesn't matter if a massive object hits you, or you hit a massive object.

Acceleration/Deceleration matters.

A car going 100 miles an hour crashing head on into another identical car moving 100 miles in opposite direction is the same as a car going 100 miles an our and hitting a brick wall.

I would probably take the oncoming car instead of the wall. With the car, if large debris like an engine block doesn't go thru you, I think you would have a better chance of survival. With the wall you are going to stop quickly. The oncoming car your body has a chance of a more glancing blow. So I think these collisions are more complicated than simple momentum / kinetic energy equations in a first year university Newtonian physics course, calculus based or not.

In this tire rim video, I think knowledge of trauma is more important than basic physics. How much his skull deformed, brain got scrambled etc., but I think the money shot is at 32 seconds, his neck is probably broken (I have no medical training).

[achyman63]

The wheel in the sky killed him

[jybrick]

Originally Posted by HotPlate101 ↗

If this guy was an American employee he'd have to waste 2 hours each morning going over safety regulations.

Maybe they aren't a waste, though, evidently. Also, the second guy, who went over the safety regulations, stood about 15 feet back because he knew something bad was going to happen.

[f4lc0x]

Aie !