OT: Why are 3 door cars allowed on the road?

Commander Kinsey · 2021-06-16T15:26:00+00:00

We have safety requirements for almost everything, but having no door next to you in the back is surely a problem in a fire or rolled squished car?

Jun 16, 2021 Last reply: 5 years ago 253 Replies

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Commander Kinsey 5 years ago

Then blame the search engine.

10kg weight hits 1kg weight head on, both going at 50mph. End result is both travelling at 41mph in the direction of the 10kg thing. So the big thing changed by only 9mph, while the little thing changed by 91mph. Simple - the momentum before the crash equals the momentum after the crash. This is why it's crazy when people say two cars hitting head on effectively doubles the crash speed. It does no such thing. If the cars are similar weights, they will both come to a halt, just like if you hit a concrete wall.

Cars are curvy for that reason.

I wasn't driving a bus.

Hey, check this out if you want a laugh:

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You really need to pay more attention on the road.

Nope, I drive fast when I can see that distance ahead.

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Commander Kinsey 5 years ago

Actually, in more. As it won't be used outside.

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Commander Kinsey 5 years ago

How come you're rich if he wasn't?

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Commander Kinsey 5 years ago

How does that stop the load sliding?

Have, see below. Maximum legal weight, 50 tonnes.

You really need to pay more attention on the road.

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rbowman 5 years ago

That would be more ambiguous. You would have to say 'a line perpendicular to a line tangent to the curve'. By definition a tangent touches a curve at one point and you cannot construct a line perpendicular to a point. Even if you go with leibnitz's definition of two points infinitesimally close together you have a problem.

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rbowman 5 years ago

If you're going to crash into the edge of a bridge do it right:

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Commander Kinsey 5 years ago

Because of the soft water.

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Commander Kinsey 5 years ago

It gave me a number. It didn't need interpreting.

Why not?

Simple application of conservation of momentum. m1v1 = m2v2

With precisely the same force as if they hit a non-moving brick wall. As I said, you don't add the speed of the other car.

They have to be a little bit curvy for health and softy laws.

I can assure you the centre of gravity (the stinky guts) ended up sieved into my engine bay.

You predict them not paying attention, trying to overtake, etc.

Compared to most people, yes.

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Commander Kinsey 5 years ago

You have admitted the same yourself.

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Commander Kinsey 5 years ago

I have no interest in that use.

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Commander Kinsey 5 years ago

Expensive kids? Where do you buy them from?

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Commander Kinsey 5 years ago

I have no problem with you saying a line perpendicular to a curve. Just imagine you're a car travelling on that curved road. Stick your arm straight out the window. Your arm is perpendicular to the curved road.

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Commander Kinsey 5 years ago

Well I saw the cab tip forwards about 20 degrees. I can't tell what was going on inside the enclosed trailer.

Maximum legal weight, 50 tonnes.

Predict what they're going to do by their actions. My mate passed his test by avoiding a lorry with busted brakes coming down a hill, because he saw the smoke. The tester asked why he was waiting when he had priority, then s*it himself as the lorry flew past just in front of them and wrote "pass".

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