Correct Answer to Question 5 Correct Answer to Question 5
The graph shows that at the instant t = 2 sec, the displacement of
the object is 5 meters.
Since the object started (at t = 0) with a displacement
of 0, the change in displacement 
X
was 5 meters during the time interval
t = 2 seconds.
The average speed <V> is defined as the
ratio of the displacement change
X
to the time interval
t
in which that change took place:
<V> =
X / t =
2.5 m/sec
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