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  Introduction to Motion in One Dimension This tutorial is about how things move along a straight line or, more scientifically, how things move in one dimension. This is useful for learning how to describe the movement (motion) of cars along a straight road or of trains along straight railway tracks. There are three features of motion that we use to describe exactly how an object moves. They are: Did You Know? The jerk is the name we give to how fast the acceleration is changing. Position   tells us about an object’s location or displacement   tells us about change of location Speed   tells us how fast the object is moving & velocity   tells us how fast the object is moving and where it is moving to. Acceleration   tells us exactly how fast the object’s speed and velocity are changing. Definition: Distance Distance is the total length of the path taken in going from the initial position, to the final position.  Distance is a scalar quantity. Quanti...