Graphing Motion Distance Time graphs (AKA position time)

- y-axis represents distance - x-axis represents time What are distance-time graphs? Distance-time graphs show how far something travels in a certain amount of time - y-axis represents distance (dependent variable) - x-axis represents time (independent variable)

Use what you learned from the PhET moving man simulation……. Describe the type of movement for each line segment listed below. 1. 2. 3. 2 positive motion (up or to the right) 3 1 at rest – standing still (flat line with no slope) negative motion (down or to the left)

Straight lines  constant motion or constant speed Curved lines  motion that is not constant or speed that is not constant

The angle of the line in a graph is the slope The angle of the line in a graph is the slope. Rank the lines in the graph from highest slope (steep line) to the lowest slope. _____, _____, _____ A B C

A distance time graph may be used to determine SPEED

What is the speed for each line in the graph? B. C. 4 m / 1 s = 4 m/s 5 m / 3 s = 1.7 m/s 2 m / 3 s = 0.67 m/s

Graph 1 a) Two people head out for a walk. Looking at the graph below, which do you think is walking faster? red b) Using the graph, calculate the average speed of each person. Green person's speed: Red person's speed: 1.4 m / 2 s = 0.7 m/s 2 m / 1 s = 2 m/s

Graph 2 a) Two people head out for a bike ride. Looking at the graph below, which do you think is faster? purple b) Using the graph, calculate the average speed of each person. Purple person's speed: Yellow person's speed: 6 km / 1 hr = 6 km/hr 4.2 km / 3 hr = 1.4 km/hr