Halliday, Resnick & Walker — Motion Along a Straight Line: Problem 4

Figure 2.4 is a graph of a particle’s position along an \( x \) axis versus time. (a) At time \( t = 0 \), what is the sign of the particle’s position? Is the particle’s velocity positive, negative, or 0 at (b) \( t = 1 \text{ s} \), (c) \( t = 2 \text{ s} \), and (d) \( t = 3 \text{ s} \)? (e) How many times does the particle go through the point \( x = 0 \)?