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    Freight versus Passenger Trains - different braking....

    OK, For those of you who've stated that tonnage is a factor, I would very much like to show you what I've been taught in physics. It is: c=Ff/N where c is the coefficient of friction, Ff is the friction force and N is the normal reaction. This means that however heavy you are...
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    Freight versus Passenger Trains - different braking....

    I know this is an odd question, but why do freight trains and passenger trains have different braking distances......? They should be the same: the coeffecient of friction..... Is this true, or does the coefficient of friction change, say with temperature? Can someone explain this to me in...

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