Long and Triple Jump
Plasticine is placed at the front of the take-off board in the triple and long jump so that officials will know if an athlete has overstepped the mark. A foul jump will leave a foot imprint in the strip of plasticine.
A standard running track has eight lanes. Each land is 1.22m wide. All tracks are run around in an anti-clockwise direction.
At major athletics meets, a sprinter's time is recorded by a photo finish camera mounted above the finish line. A sensor connected to the starting gun starts a clock, and the camera measures the time as each athlete crosses the finish line. Using the photo finish camera, times can be recorded to 1/1000 of a second.