On Wednesday 25 January 2006 22:07, Carleton MacDonald wrote: > True. 600 km to destination, and I'm going 100 km/h. Six hours. > > > > Change the speed to meters per second, and the mental calculation becomes > almost impossible.
But if you decelerate at 9 m/s^2 and you want to figure your stopping distance, it's easier if the speed is in meters per second. Likewise, if a storm picks up a straw and hurls it at a board, you want the speed in meters per second, but if you want to figure out when the storm will get to Louisiana, you want kilometers per hour. phma
