smart arse
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I don't know Alan, you've made my head hurt.
Just when I thought I'd grasped it, something occurred to me - If the car hits a stationary wall, the force applied is speed x mass. Simple. But if the wall was moving away at the time, surely the impact would be reduced, and would continue to reduce if the "moving away" speed of the wall is increased, until the impact force becomes zero when the walls speed matches the vehicle. Now would the impact force not increase if the wall moved towards the approaching vehicle?
I think my puny brain cell is not enough for me to grasp this, and it would be a case of "show me then I'll get it".
No...I was quite wrong about the impact speed being doubled...when infact that....the wall is solid...and has exactly the same effect as if it were two cars hitting each other head on.....because the cars are doing the same speed the impact is the same as hitting the wall...because the speed is cancelled out and the vehicles are coming to an abrupt dead halt....as if they had hit a wall.. 50mph -----/o miles per hour/-----50mph...same as a brick wall...from 50mph to 0mph in an instant...
unless it was in Grosvenor Crescent:eyebrows:
Actually, no. The force of impact and energy involved would (in theory) be identical, hence consequent damage would be similar. Assuming the other car was indentical, moving at the same speed and hit exactly square on.
Mind you, there will be so many variables that a situation precisely like that will never occur.