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Q: What is the speed of a boy who runs a 100m race in a time of 4.5s?
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Calculate average velocity and average speed?

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?


What is the speed of a bicycle that travels 100m in 50sec at constant speed?

speed = distance/time = 100m / 50s = 2 m/s


Who has the fastest time in the last 100m in the 200m or 400m race and What is the time set?

usain bolt!


How does accleration apply in track?

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.


Why do athletes hold their breath during a 100m 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.


What is the average speed of a train which covers a distance of 100m in 5seconds?

Average speed = distance/time = 20 metres per second.


What is Anne mollingers best 100m time?

It was none existent because she never ran an actual race


What is the speed of Usain Bolt?

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


Who has the best speed in sprinting?

Usain Bolt holds the world record for fastest 100m time.


What was Florence Griffith Joyner's best time in 100m race?

10.49 seconds at the U.S. Olympic Trials in July, 1988.


What is the total distance traveled formula?

Speed multiplied by time. ex. 100m/s * 5s = 500m


If athlete runs race of 100 m and is time is 10.0 what is average speed?

10 metres/ second, 36 km/h, 22.5 MPH