If someone else was looking at the same boy, his frame of reference will be different. The train was moving from left to right, making to your right positive and to your left negative. MOTION IN ONE DIMENSION - GRADE 10 boy is standing stillįrom your frame of reference the boy is moving from left to right.įigure 3.1: Frames of Reference A frame of reference must have an origin (where you are standing on the platform) and at least a positive direction. According to the boy, and his frame of reference (the train), he is not moving.ĬHAPTER 3. To you it looks as if the boy is moving from left to right, because relative to where you are standing (the platform), he is moving. You are standing on the platform watching the train move from left to right. MOTION IN ONE DIMENSION - GRADE 10Ī train as it pulls out of a station. For example, a boy is standing still inside 23ĬHAPTER 3. A frame of reference is defined as a reference point combined with a set of directions. Notice that you need a reference point (the doorway) and a direction (inside) to define your location.ĭefinition: Frame of Reference A frame of reference is a reference point combined with a set of directions.Ī frame of reference is similar to the idea of a reference point. This defines your position inside the classroom. For example, if you are 2 m from the doorway, inside your classroom then your reference point is the doorway. However, saying that you are here is meaningless, and you have to specify your position relative to a known reference point. The word position describes your location (where you are). The most important idea when studying motion, is you have to know where you are. Reference Point, Frame of Reference and Position
#EASY GRADE PRO 3.6 2 HOW TO#
You will also learn about the equations that can be used to describe motion and how to apply these equations to objects moving in one dimension. You will learn how to read and draw graphs that summarise the motion of a moving object. You will also learn how to use position, displacement, speed, velocity and acceleration to describe the motion of simple objects. acceleration which tells us exactly how fast the object’s velocity is changing. speed or velocity which tells us exactly how fast the object’s position is changing or more familiarly, how fast the object is moving, and 3. position or displacement which tells us exactly where the object is, 2. These three ideas describe different parts of exactly how an object moves. If you want to understand how any object moves, for example a car on the freeway, a soccer ball being kicked towards the goal or your dog chasing the neighbour’s cat, then you have to understand three basic ideas about what it means when something is moving. This is useful for learning how to describe the movement of cars along a straight road or of trains along straight railway tracks. This chapter is about how things move in a straight line or more scientifically how things move in one dimension.