Consider the following combinations of signs and values for the velocity and acceleration of a particle with respect to a one-dimensional x-axis:
|
Velocity
|
Acceleration
|
|
a.
|
Positive
|
Positive
|
|
b.
|
Positive
|
Negative
|
|
c.
|
Positive
|
Zero
|
|
d.
|
Negative
|
Positive
|
|
e.
|
Negative
|
Negative
|
|
f.
|
Negative
|
Zero
|
|
g.
|
Zero
|
Positive
|
|
h.
|
Zero
|
Negative
|
Describe what the particle is doing in each case and give a real-life example for an automobile on an east- west one- dimensional axis, with east considered the positive direction.