A4.0-kg particle moving along the x-axis is acted upon by the force whose functional form appears below. the velocity of the particle at x=0 is =6.0m/s. find the particle’s speed at x=(a)2.0m,(b)4.0m,(c)10.0m,(d) does the particle turn around at some point and head back toward the origin? (e) repeat part (d) if =2.0m/satx=0.