Two cars collide head-on on a busy street. An observer standing on the street witnesses the accident and calculates how much of the cars' initial kinetic energy went into deforming the cars upon collision, Er. A police officer was driving next to one of the cars at a matching speed when the cars collided. Part A Would this officer calculate a higher value of Eder. a lower value of Eder, or the same value of Eder if he used the velocities of the cars measured in his reference frame