In a recent high school competition, John won the 100 meter dash. His winning time was 8.61 seconds. find his average speed to the nearest tenth of a meter per second.
First of all......John would be the fastest person in the world, leaving the current record-holder, Usain Bolt, in the dust!!!
So we have ....... distance / time = rate
100m / 8.61 seconds = about 11.6 meters per second.......!!!!