Oncoming Car on the wrong side of a Dual Carrageway

[E53AMG]

Impact force at 100mph will be double that for 70mph.

Devastation total for both though.

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[Petrol Pete]

thanks for letting us know that you do business in USA. lol

What does that mean ? I work all over the world. Just saying these signs exist on the roads in the USA.

 

[Petrol Pete]

Devastation total for both though.

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Two cars (of the same weight) rushing headlong towards each other at 70 mph have a closing speed of 140 mph. But the impact will take place at 70 mph.

Discuss.

Still pretty rough though.

 

[C36fan]

What does that mean ? I work all over the world. Just saying these signs exist on the roads in the USA.

thanks for let us know that you work all over the world. lol

 

[kianok]

Did you report it?

 

[markjay]

Happens all the time, apparently....:

Drunk mum who drove nine miles the wrong way down A19 told police 'I'm lost'

 

[219]

I'm fairly sure we've had them for some time now, on slip roads where it is deemed to be a risk. However, I'm not at all convinced they're going to entirely solve the problem. While they might catch a few dozy eejits, if the sight of several miles of consistently oncoming vehicles plus traffic matching you on the other side of the barrier hasn't rung any alarm bells, then a no entry sign at the start isn't going to register at all on the hare-brained morons.

Quite common , if not universal, to have ‘no entry’ signs at the top of exit lanes .

 

[190]

Two cars (of the same weight) rushing headlong towards each other at 70 mph have a closing speed of 140 mph. But the impact will take place at 70 mph.

Discuss.

Isn't it about dissipation of kinetic energy.

Example 1.
Both car have the same velocity and mass therefore the same kinetic energy. If they hit head on the kinetic energy of one car is balanced out by the kinetic energy of the other so that when they are stopped there is zero kinetic energy.

Example 2. If one car hits a solid brick wall, the same amount of kinetic energy is dissipated as in the example of one car above.

Does that mean a head on collision is the same as hitting a brick wall ?

And is that what you mean by the impact taking place at 70 mph ?

 

[markjay]

Head-On Collision

 

[Petrol Pete]

Isn't it about dissipation of kinetic energy.

Example 1.
Both car have the same velocity and mass therefore the same kinetic energy. If they hit head on the kinetic energy of one car is balanced out by the kinetic energy of the other so that when they are stopped there is zero kinetic energy.

Example 2. If one car hits a solid brick wall, the same amount of kinetic energy is dissipated as in the example of one car above.

Does that mean a head on collision is the same as hitting a brick wall ?

And is that what you mean by the impact taking place at 70 mph ?

Yes. But no one at the funerals of the occupants of the cars involved would be much interested in our physics discussion no doubt .

 

[Bellow]

More intuitively. You are travelling at 70mph and are destined to hit the front of a car head on. Would you rather hit a that car when it was travelling toward you at 70mph - or when it was stationary?