On Wed, 30 Mar 2005, Howard Winter wrote:
>> Braking track length at 1g is (at 0.5g the track doubles):
>>
>> 50kph	14m/sec		98m
>> 40kph	11m/sec		61m
>> 30kph	 8m/sec		34m
>> 20kph	 5m/sec		15m
>> 10kph	 3m/sec		4.5m
>
> Errr - I don't think so!  That top one means that even if you didn't slow down it would take seven seconds to
> travel that 98m, and stopping from 50kph certainly doesn't take 7 seconds...
>
>> The formula used was x = v^2 / (2 * a)
>
> I suspect you should have square-rooted the answer to this.

How about a decimal point ? 9.8 meters, 6.1 meters, ... my mistake 
anyway.

Peter
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