Question: What is the ratio K1/K2 when K1 is the kinetic energy converted to internal energy when two cars each initially traveling at 88 km/h collide head-on and K2 is the kinetic energy converted to internal energy when a car moving at 88 km/h hits a stationary car? Assume that both cars have the same inertia and that the collisions are totally inelastic. (Hint: Determine how much of the energy is required to move the center of mass in each case.)