Waylander Posted August 12, 2012 Report Share Posted August 12, 2012 How come the 100m split for 4x100 is faster than than 1/2 of 200m time which is turn is less than 1/2 100m time? WR for 100m is >2 x 200m WR which is > 2x 4x100m? Never really got this exp the 200m vs 100m times :confused: Link to comment Share on other sites More sharing options...
billy2shots Posted August 12, 2012 Report Share Posted August 12, 2012 Wow really confusing Waylander. I will take a stab of answering what I think your asking. The slowest point of any race is the start. In relays only one person starts from the blocks, the other 3 have 'rolling starts' if you will. That's why a 4x100m relay can be faster than 4 x a single 100m race. Link to comment Share on other sites More sharing options...
Twinspark Posted August 12, 2012 Report Share Posted August 12, 2012 There are some official splits out there for the 100m, at least. As Billy says, legs 2, 3 and 4 have 'rolling' starts in the 100m. Faster than coming out of the blocks, but it's not a full-speed changeover. However, it's still faster than 2x200m, as a sprinter only hits peak speed for a very small part of the race. The splits on 40-50m and 50-60m are largely the same and the peak speed for a sprinter - beyond 60m, they start to slow - which also explains why the individual 200m is slower than 2x100m. Link to comment Share on other sites More sharing options...
cruiser647 Posted August 12, 2012 Report Share Posted August 12, 2012 Watching the 4 x 100m relay last leg, the way Bolt just strode away from the US bloke! Link to comment Share on other sites More sharing options...
Scotty Posted August 12, 2012 Report Share Posted August 12, 2012 How do they time the relay splits? It's not easy to time when one stops and the other starts. I can't be the batton handover as that would vary so much ... wouldn't it? Link to comment Share on other sites More sharing options...
Twinspark Posted August 12, 2012 Report Share Posted August 12, 2012 The relays have 'ticks' on the track to mark the 'changeover zone'. The zone is 20m long, with a marker at 10m. The first 10m is to get up to speed, the 2nd 10m (after the 'scratch' mark) to complete the changeover. I assume they're timing from the 'scratch' mark half way through the changeover box. 400m relays will time the first leg to the scratch mark in the changeover zone, with subsequent legs timed to the finish line. (This is working on 15 year old memories... I know the GB team get slated for botched baton changes - but it's very difficult to do this when you're trying to changeover at 20mph!) Link to comment Share on other sites More sharing options...
Scotty Posted August 12, 2012 Report Share Posted August 12, 2012 But if you're both doing 20mph then it's the same as standing still Link to comment Share on other sites More sharing options...
NewNiceMrMe Posted August 12, 2012 Report Share Posted August 12, 2012 The athletes are running when the cross the yellow mark that signals the end of the changeover window. So, like a car, it's a rolling start. They start the 100m whilst moving. Takes a good second off and is the reason Usain Bolt ran the fastest recorded 100m - 8.8 seconds. Link to comment Share on other sites More sharing options...
Waylander Posted August 12, 2012 Author Report Share Posted August 12, 2012 I guess in that case the impact of the standing start is even more stark in the 200m vs 100m as the 2nd 100m has to be so fast that it negates and then compensates for the standing start of the first 100m. Interesting. Link to comment Share on other sites More sharing options...
Calm Chris Posted August 12, 2012 Report Share Posted August 12, 2012 Pretty sure the batons have chips inside them as part of the tagging for legality and time. Link to comment Share on other sites More sharing options...
Twinspark Posted August 12, 2012 Report Share Posted August 12, 2012 Not sure the baton is tagged, but the bib numbers have RFID chips in them. Link to comment Share on other sites More sharing options...
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