Motion Is it moving? How is it measured?. Describing Motion MOTION When an object changes position relative to a reference point we call it MOTION! Reference.

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Presentation transcript:

Motion Is it moving? How is it measured?

Describing Motion MOTION When an object changes position relative to a reference point we call it MOTION! Reference point Reference point A Reference point is a stationary object that must be observed and used to describe motion.Reference point

Describing Motion Displacement Displacement Displacement is how far something travels in a given direction. It is a Vector. Vectors include both magnitude and direction. Distance Distance is how far something travels. It is a Scalar. Scalars include only magnitude, but no direction

Describing Motion Velocity Velocity is how fast something is moving in a certain direction. It is a vector. Vectors include both magnitude and direction. Speed Speed is how fast something travels. It is a Scalar. Scalars include only magnitude, but no direction

The distance traveled by an object in a period of time often is expressed using a line graph. A line graph visually conveys information using sets of data points. 1.Copy the blank graph below on your paper. Complete the graph by plotting the given data points on the graph. Each set of data points represents (time, distance). Note that time is measured in seconds and distance is measured in meters. Connect the plotted points with a straight line. Data points: (0, 0), (2, 40), (4, 80), (6, 120), (8, 160), (10, 200) 2.Describe the motion shown on the graph. Distance-Time Graphs

Distance- Time Graphs for Motion of Three Cars

Distance vs Time Graph How does slope illustrate velocity ?

Calculating Average Speed