HALLIDAY SOLUTIONS - CHAPTER 2 PROBLEM 37 - Fundamentals of Physics 10th

Figure 2-29 depicts the motion of a particle moving along an x axis with a constant acceleration. The figure’s vertical scaling is set by xs=6.0 m. What are the (a) magnitude and (b) direction of the particle’s acceleration?

[anderiotti]

Due to the slope in t=0 wasn't it trivial to assume that v_0 is equal to zero?