This means that
ā
v
=
Ī
x
Ī
t
. We can manipulate t
ā
v
ā
Ī
t
Before we put our values into the equation, we will convert the speed to
m
s
55
k
m
h
r
ā
1000
m
1
k
m
ā
1
h
r
3600
s
=
15.28
m
s
Now we can calculate
Ī
x
:
Ī
x
=
(
15.28
m
s
)
ā
(
0.75
s
)
=
11.46
m
ā“
You will have moved
11.46
m
before you begin to slow down.
You could also start with the kinematic equation
Ī
x
=
ā
v
i
Ī
t
+
1
2
ā
a
Ī
t
2
, where
ā
a
=
0
. This gives
Ī
x
=
ā
v
i
Ī
t
