The equation v_f=v_i+at is used to calculate the final velocity of an object undergoing constant acceleration. v_f is the final velocity in m/s v_i is the initial velocity in m/s a is the acceleration in m/s^2 t is the time in seconds. An object starts moving along a straight line with an initial velocity of 4+3im/s It accelerates for a time period of t=2−i seconds under constant acceleration a=1+2im/s^2 What is v_f ? Enter your answer in the box.