Comparing motion on a graph MEASURING MOTION. DESCRIBING MOTION Reference point – a point used for comparison Position: describes where you are (2ft in.

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Presentation transcript:

Comparing motion on a graph MEASURING MOTION

DESCRIBING MOTION Reference point – a point used for comparison Position: describes where you are (2ft in front of chalkboard) Distance or Distance Traveled: total length of trip (rode 5 miles) Displacement: final change in position (with direction)

GRAPHING MOTION

CALCULATING SLOPE The slope of position vs. time graph gives you velocity Rise over run (Y 2 -Y 1 )/ (X 2 -X 1 ) Steep slope = fast Gradual slope = slow Flat line = at rest

SAMPLE SLOPES

EXPLAIN WHAT IS HAPPENING

DESCRIBING AND MEASURING MOTION On Saturday, Bolton rode his bike to visit Murtha. Murtha’s house is directly east of Bolton’s. The graph shows how far Bolton was from his house after each minute of his trip… 1.Bolton rode at a constant speed for the first 4 minutes of his trip. What was his average speed? 2.What was his average speed for the entire trip? 3.What was his average velocity for the entire trip? 4.Bolton stopped to talk to Smola during his trip. How far from his house was he stopped?