Game Development Reference
In-Depth Information
Figure 11.2
Determining average velocity
graphically
even in situations where forward progress is being made for a portion of the
interval, such as the larger interval between t
2
and t
4
. It's a case of “one
step forward, two steps back.”
Average velocity can also be zero, as illustrated during the hare's nap
from t
4
to t
7
. In fact, the average velocity will be zero any time an object
starts and ends at the same location, even if it was it motion during the
entire interval! (“Two steps forward, two steps back.”) Two such intervals
are illustrated in Figure 11.3.
Figure 11.3
Two intervals during which the hare has
no net displacement, and thus his average
velocity is zero
And, of course, the final lesson of the fable is that the average velocity
of the tortoise is greater than the average velocity of the hare, at least from
t
0
to t
7
, when the tortoise crosses the finish line. This is true despite the
fact that the hare's average speed was higher, since he certainly traveled a
larger distance with all the female distractions and pacing back and forth.
Search WWH ::
Custom Search