A particle confined to motion along the x axis moves with constant acceleration from x = 2.0 m to x = 8.0 m during a 2.5-s time interval. The velocity of the particle at x = 8.0 m is 2.8 m/s. What is the acceleration during this time interval? 0.48 m/s 0.32 m/s 0.64 m/s 0.80 m/s 0.57 m/s2