PRACTICE IT Use the worked example above to help you solve this problem. An pickup truck with mass 1.89 x 103 kg is traveling eastbound at +14.6 m/s, while a compact car with mass 9.13 x 102 kg is traveling westbound at -14.6 m/s. (See figure.) The vehicles collide head-on, becoming entangled. (a) Find the speed of the entangled vehicles after the collision. 5.0889 J m/s (b) Find the change in the velocity of each vehicle. A"truck = *5? m/s = a m (c) Find the change in the kinetic energy of the system consisting of both vehicles. w EXERCISE HINTS: GETTINGSTARTED | I'MSTUCK! Use the values from PRACTICE IT to help you work this exercise. Suppose the same two vehicles are both traveling eastward, the compact car leading the pickup truck. The driver of the compact car slams on the brakes suddenly, slowing the vehicle to 5.35 m/s. If the pickup truck traveling at 17.9 m/s crashes into the compact car, find the following. (a) the speed of the system right after the collision, assuming the two vehicles become entangled 13.8121 J m/s (b) the change in velocity for both vehicles Avtmck= 4.08781 J m/s Av = 31.7121 X car Your response differs from the correct answer by more than 100%. m/s (c) the change in kinetic energy of the system, from the instant before impact (when the compact car is traveling at 5.35 m/s) to the instant right after the collision AKE = 262449.23E x What is the definition of kinetic energy? What is the definition of the change in kinetic energy? J