Which of the following best illustrates a use of friction in the transportation industry? a. when a passenger jet burns fuel and shoots exhaust out its back end, the jet responds by moving forward. b. when a locomotive's brakes are applied to train tracks, the force between the brakes and the tracks causes the locomotive to slow down. c. when a ship is launched out to sea, the downward force of the ship onto the water is balanced by the water's upward force onto the ship. d. when a driver applies a force to a car's accelerator pedal, the car responds by traveling at a faster speed.