Problema Solution
Donovan Bailey of Canada broke the world record in the 100m dash at the 1996 Atlanta Olympics with a time of 9.84 seconds. With this gold medal, he became "the world's fastest man"
a.
What was his average velocity over this distance in meters per second and miles per hour?
Answer provided by our tutors
d = 100 m
t = 9.84 s
v = the average velocity
the average velocity = distance/time
v = d/t
v = 100/9.84
v = 10.1626 m/s
the average velocity over this distance in meters per second is 10.1626 m/s.
1 meter = 0.000621371 miles
d = 100 meters = 100*0.000621371 = 0.0621371 miles
1 s = 1/(60*60) = 1/3600 h
t = 9.84 s = 9.84/3600 h
v = 0.0621371/(9.84/3600)
v = 22.733 mph
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the average velocity over this distance in miles per hour is 22.733 mph.