Question

In 2009, Usain Bolt set the world record for sprinting 100 m in approximately 9 3/5 seconds.

Find his average speed in meters per second.

Answer 1

rate = 10.4 m/s

Explanation:

change 9 3/5 seconds to a decimal

9 3/5 seconds = 9 6/10 = 9.6 seconds

rate = distance/ time

rate = 100 m/ 9.6 seconds

rate = 10.4166666666 m/s

rounding

rate = 10.4 m/s

Answer 2

distance=100m

time=9.6s(actually world record set was 9.45s i think)

average speed=100/9.6=10.416 m/s

Hope this helped!