HOW ISAAC NEWTONS THREE LAWS APPLY

AN OBJECT AT REST WILL STAY AT REST OR AN OBJECT IN MOTION WILL STAY IN MOTION

THE CARTS WILL NOT MOVE UNTIL FORCE PUCHES THE CART

THE ACCELERATION OF AN OBJECT DEPENDS ON THEN MASS OF THE FORCE

THE MORE FORCE OR MASS OF THE CART THE FASTER IT WILL GO

EVERY ACTION HAS AN EQUAL AND OPPOSITE REACTION

WHEN IT COMES DOWN IT KICKS BACK BEFORE IT STARTS GOING UP THE HILL