A train remains in motion while delivering supplies as it is being pulled on by the tank engine, it comes to a complete halt at its most recent stop to drop off its goods thanks to being pushed by the breaks, it will remain in this state until the break is released and the train is put back into motion
NEWTON'S FIRST LAW IS "AN OBJECT IN MOTION WILL STAY IN MOTION AND AN OBJECT AT REST WILL STAY AT REST UNLESS ACTED ON BY AN UNBALANCED FORCE
TRAIN (IN MOTION)
The Locomotive engine is pulling with a net force of 100N RIGHT
100N-85N=15N RIGHT
The Train carts are pulling in the opposite direction than the locomotive engine with a net force of 85N LEFT
NEWTON'S SECOND LAW IS "THE ACCELERATION OF AN OBJECT DEPENDS ON THE VARIABLE OF NET FORCE AND THE VARIABLE OF MASS
MASS OF 500LBS
A Motorcycle is left on a train track. Causing the train to smash into the motorcycle, and exert a force greater than that of the Vehicle, leading to the complete destruction of the Bike, while only slightly damaging the train
NEWTON'S 3RD LAW IS "FOR EVERY ACTION IS NATURE THERE IS AN EQUAL OR OPPOSITE REACTION