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I don't know for sure, but I think mph and km/h speeds are
used today because horse-drawn wagons (particularly drays used for commercial
purposes) sometimes used odometers which allowed speed to be determined using a
stopwatch. -- Jason
----- Original Message -----
Sent: Wednesday, January 25, 2006 5:41
PM
Subject: [USMA:35854] RE:
Weatherbug
On 2006 Jan 24 , at 9:29 AM, Jon Saxton wrote:
The whole km/h vs m/s debate ... makes me wonder how we got stuck
with speeds measured on an hourly basis. ... Any
thoughts?
The only speed measurements familiar to many people is the speeds at
which they drive their automobiles. They measure those speeds in miles per
hour or in kilometres per hour because they relate distances driven to time
measured on a clock, predominately in hours.
Thus, I think they just are familiar with mph or km/h and usually don't
think in terms of metres per second or feet per second or anything
else.
Regards,
Bill
Hooper
Fernandina Beach, Florida, USA
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SIMPLIFICATION begins
with SI
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