At time t=0 s a 0.362-kg air track glider is moving rightward at 5.1 m/s. At t=2.5 s, it's going leftward at 5.4 m/s. Determine the magnitude and direction of the constant force that acted on the glider during this interval. Give your answer in Newtons. If the force is going rightward, your force should be positive. If the force is going leftward, your force should be negative. There should be only one answer to this problem as it's being submitted on a website from one of many computer generated set problems. I understand w=mg but not much past setting up the regular a=f/m equations rather than diving into Kinematic formulas to solve something Algebraically. In other words, I'm kind of clueless.