Use Figure 5.11a to conceptualize
the situation. From everyday experience,
we know that a car on an icy incline will accelerate
down the incline. (The same thing happens
to a car on a hill with its brakes not set.)
Categorize We categorize the car as a particle
under a net force because it accelerates. Furthermore,
this example belongs to a very common category of problems in which an object moves under the influence of
gravity on an inclined plane.