*  Reading Outline, Sec2.1 *
----------------------------------------

* Vocabulary/Definitions *
 - Velocity and speed
 - Average velocity
 - Instantaneous velocity
 - The slope of a curve at a point
 - Instantaneous and average velocities as slopes of lines on the graph
   of distance vs. time



* Understand *
1. Explain the paradox of trying to find speed by looking at an instant
in time.  How do we get around this problem?

2. If the vertical position of a purple-headed black-winged
fuzzy-chested African sparrow is given as a function of time by
s(t) = 4 + sin(3 t) (in meters, with t in seconds), what is
the bird's average velocity between t=1.5 and t=2.0?  What is
its instantaneous velocity at t=1.5 to within 0.1 m/s?