I have solved 004 and got 12.972 as the change in velocity. I am having a little difficulty solving for 005. Initially I thought I could use the x=(1/2)(2.35)(5.52)^2+Vb(5.52) kinematics equation, but for some reason it's not right. The answer I got with my attempt was Vb =11.57559. Am I not supposed to use kinematics in this situation? What am I doing wrong?