1. The problem statement, all variables and given/known data In a crash test a car with a mass of 1273kg collides with a wall. The x components of the initial and final speeds of the car are 22 m/s and 2.2 m/s. If the crash lasts for .16s what is the magnitude of impulse? 2. Relevant equations p=ms impulse= change in momentum change in momentum = m(Vf-Vi) 3. The attempt at a solution So the first thing I think I need is change in momentum which equals = m(Vf-Vi) however, I don't understand how you get the final and initial velocity when they only gave you the x components. Does it have something to do with using the Pythagorean theorem?