Part 1: Making a Graph (11 Pts)

Points: ___ /15 Name: ______

Graphing Speed

Part 1: Making a graph (11 pts) Make a graph for the rolling ball. All data (distance and time coordinates) are given below for a rolling ball.

Time Distance Title the graph “distance vs. time for rolling ball” (sec) (m) 0.3 3 Label x-axis as time in seconds 0.5 6 Label y-axis as distance in meters

0.7 7.5 Use a true number line of .10 (.10, .20, .30, etc) for the x-axis 0.9 10 Use a true number line of 1 for the y- axis 1.1 12 1.3 14.3 Plot the data 1.5 15 Use a line of best fits 1.7 17 1.9 20 2.1 22 2.3 23

Answer the following questions regarding the graph you made 1. What is the ball’s speed at 1.3 seconds?

2. What is the ball’s speed at 1.7 seconds?

3. Is the ball at constant speed or does it change?

4. What is the slope of this line?

Part 2: Analyzing Speed Graph (5 pts) Look at the graph and answer the following questions

1800 1600 1400 ) 1200 m (

e 1000 c n

a 800 t s i 600 D 400 200 0 1 2 3 4 5 6 7 8 9 10 11 Time (min)

On Saturday, Ashley rode her bike to visit Maria. Maria’s house is directly east of Ashley’s. The graph shows how far Ashley was from her house after each minute of her trip.

1. Ashley rode at a constant speed for the first 4 minutes of her trip. What was her constant speed?

2. What was her average speed for the entire trip? 3. What was her average velocity for the entire trip?

4. Ashley stopped to talk with another friend during her trip. How far was she from her house when she stopped?

5. What is the slope of the line after Ashley stopped to talk with her friend? How is the slope of the line related to her speed?

Part 3: Analyzing Multiple Speed Graphs (6 pts)

Examine the graph below:

250 ) m ( 200 n o i t i

s 150 o P 100

0 1 2 3 4 5 6 7 8 9 10 11 Time (sec)

1. Which object’s speed is larger at 8 seconds?

2. Which object’s speed is larger at 12 seconds?

3. What is the speed of each object at 4 seconds?

4. Explain the motion of object 1.

5. Explain the motion of object 2 (there is more than one motion).

6. At what time doe the objects have the same speed?