21.1 Introduction
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Chapter 21: Motion in one dimension
21.1 Introduction (ESAGS)
This chapter 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:
The jerk is the name we give to how fast the acceleration is changing.
Traffic often moves along a straight line.
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position which tells us about an object's location or displacement which tells us about change of location
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speed which tells us how fast the object is moving or velocity which tells us how fast the object is moving and where it is moving to, and
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acceleration which tells us exactly how fast the object's speed and velocity are changing.
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