Position vs Time Graphs

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Presentation transcript:

Position vs Time Graphs Created by Mrs. Bertoson Feb 2012

How to read the position vs time graph The slope is speed Increasing diagonal lines are constant speed moving AWAY from the origin Horizontal lines are stopped Decreasing diagonal lines are constant speed moving TOWARDS the origen

The distance is 40 meters How to find distance Find the distance after 10 seconds. Find 10 seconds on the axis and follow it vertically until you reach the graph. From this point, find the y-value (distance) by looking to the left. The distance is 40 meters

Practice finding distance What is the distance after 15 seconds? Find 15 seconds on the x-axis and follow it vertically until you reach the graph. From this point, find the y-value (distance) by looking to the left. The distance is 30 meters

How to find speed from 0 Find the speed from 0 to 4 seconds. Find 4 seconds on the axis and follow it vertically until you reach the graph. From this point, find the y-value (distance) by looking to the left. Plug in the numbers: (the origin was 0) Speed= distance = 20-0 = 20 = 5m/s time 4-0 4

Practice finding speed from 0 What is the average speed of the object? Find the last time on the x-axis and follow it vertically until you reach the graph. From this point, find the y-value (distance) by looking to the left. Plug in the numbers: (the origin was 0) Speed= distance = 50-0 = 50 = 2m/s time 25-0 25

How to find speed anywhere Find the speed from 6 to 10 seconds. Calculate the time. 10-6 = 4 seconds Find 6 seconds on the axis and follow it vertically until you reach the graph. From this point, find the y-value (distance) by looking to the left. Follow steps 2 and 3 for 10 seconds. Plug in the numbers: Speed= distance = 40-20 = 20 = 5m/s time 4 4

Practice finding speed anywhere Find the speed from 4 to 10 seconds. Calculate the time. 10-4 = 6 seconds Find 6 seconds on the axis and follow it vertically until you reach the graph. From this point, find the y-value (distance) by looking to the left. Follow steps 2 and 3 for 10 seconds. Plug in the numbers: Speed= distance = 18-0 = 18 = 3m/s time 6 6