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sharon sprinter changes her speed from 4.5m/s to 7.5m/s in the middle 1.5 seconds of a 100m race. what is her average velocity for this time period?
speed = distance/time = 100m / 50s = 2 m/s
usain bolt!
100m dash is all about getting to top speed as fast as possible. the faster you can get to top speed the less time it takes to complete the distance. a combination of acceleration and top speed are crucial in winning a sprint race.
athletes don't hold their breath during the 100m they hold their breath during the 50m race so they don't have to waste time breathing.
Average speed = distance/time = 20 metres per second.
It was none existent because she never ran an actual race
His last 100m run was 9.69 seconds as of the 2008 Olympics. He has also ran the 200m in 19.30 seconds and holds the world's best 150m time at 14.35 seconds. usain bolt last 100m race time was 9.58
Usain Bolt holds the world record for fastest 100m time.
10.49 seconds at the U.S. Olympic Trials in July, 1988.
Speed multiplied by time. ex. 100m/s * 5s = 500m
10 metres/ second, 36 km/h, 22.5 MPH