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Exercise 2A: Changing Velocity
This exercise involves Michael Johnson’s world-record 200-meter sprint in the 1996 Olympics. The
table gives the distance he has covered at various times. (The data are made up, except for his total
time.) Each group is to find a value of
.
x/
.
t between two specified instants, with the members of the
group checking each other’s answers. We will then compare everyone’s results and discuss how this
relates to velocity.
t (s)x (m)
A 10.200 100.0000
B 10.210 100.0990
C 10.300 100.9912
D 11.200 110.0168
E 19.320 200.0000
group 1: Find
.
x/
.
t using points A and B.
group 2: Find
.
x/
.
t using points A and C.
group 3: Find
.
x/
.
t using points A and D.
group 4 :Find
.
x/
.
t using points A and E.