Thread: Warwick Gardens at night
View Single Post
  #3   Report Post  
Old August 2nd 05, 04:53 PM posted to uk.transport.london
asdf asdf is offline
external usenet poster
  
First recorded activity at LondonBanter: Feb 2005
Posts: 1,150
Default Warwick Gardens at night
On Tue, 02 Aug 2005 16:43:40 -0000, (Mark Brader) wrote:

Tony Bryer writes:
Being a old guy who passed his test in imperial days the formula for
stopping distance was m(1+m/20) feet: the first term is basically the
distance travelled whilst your brain is getting your foot to press
the brake, the second [that travelled in] the actual time needed to stop.

However, that is an oversimplification. The distance needed to stop
under maximum braking force (or any particular force) varies as the
*square* of the speed.

Which is presumably why the quoted formula has an 'm squared' in it
(once you expand the brackets).
Reply With QuoteReply With Quote