[" stone and the ice? "],[" A "8000kg" engine pulls a train of "5" wagons,each of "2000kg" ,"],[" along a horizontal track.If the engine exerts a force of "40000N],[" and the track offers a friction force of "5000N" ,then calculate: "],[" (a) the net accelerating force; "],[" (b) the acceleration of the train; and "],[" (c) the force of wagon "1" on wagon "2.]