The Curr

Senior Member
Feb 3, 2007
33,705
In 1954 the English runner Roger Bannister broke the four-minute barrier for the mile with a time of 3:59.4 s (3 min and 59.4s). In 1999 the Moroccan runner Hicham el-Guerrouj set a record of 3:43.13 s for the mile. If these two runners had run in the same race, each running the entire race at the average speed that earned him a place in the record books, el-Guerrouj would have won by how many meters?
 

Ken

The Dutch Touch
Aug 17, 2007
13,340
I just edited it.. 109 is correct. I fucked up on how much a mile is, then decided to do give my calculator a go with a bit more correct number from google :p

Or should be anyway? You have the answer?
 

Ken

The Dutch Touch
Aug 17, 2007
13,340
Well.. 1609m devided by the slow guy's time give you his average speed. Multiply his speed with the fast guy's time, and you get the distance he's covered in the same time the fast guy took to finish the race.

The difference between the full race of 1609m and the slow guy's distance gives you the answer. If that's not correct, I really don't know how to do this :lol:
 

The Curr

Senior Member
Feb 3, 2007
33,705
A sprinter explodes out of the starting block with an acceleration of +2.29 m/s2, which she sustains for 1.31 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity at (a)t = 1.31 s and (b) at the end of the race?
 

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