Graphical Analysis: The motion of a particle is described in the velocity vs. time graph shown in the figure. 
Over the nine-second interval shown, we can say that the speed of the particle
A. only increases.
B. only decreases.
C. increases and then decreases.
D. decreases and then increases.
E. remains constant.
Answer: D
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What will be an ideal response?
Between mass and weight, the more fundamental quantity is
A) mass. B) weight. C) both the same. D) none of the above
You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?
a. 45° b. 23.4° c. 39° d. 51° e. The answer depends on the day of the year.