170 Interpreting Graphs 169 2/10/2016 Starter: What is the difference between speed and velocity? Application Notes Glue here when done Connection : Complete Ws Exit: A plane traveled North 1500 miles in 5 hours. What is the plane’s velocity? Interpreting Graphs 2/10/2016 Practice : Between which two points is there a constant speed? EQ: What forces can change the motion and speed of an object, and how are those forces used to make our world lives easier?

February 10, 2016 AGENDA 6.8 A/8.6 B I will be able to differentiate between speed, velocity, acceleration while reading and writing on notes and an activity 1 Starter 2. Notes 3. Graphs 4. Exit

Table of Contents DateLecture/ Activity/ Lab Page 1/26 Conduction Lab /27 Convection Lab /28 Radiation Lab /29 Thermal Energy Ws /1 Energy Transformations /2 Energy Transformations Lab /3 Energy Transformations Poster /4 Energy Transformations Lab II /8 Speed, Velocity, and Acceleration Notes /9 Speed and Velocity Lab /10 Interpreting Graphs

Starter Between which two points is there a constant speed? Points B and C Between points A and B is acceleration Between C and is deceleration

Practice: GUIDELINES FOR MAKING GRAPHS A graph is a kind of picture use to show quantitative data, measurements and numbers collected during an experiment. Most graphs have the same basic parts: – title that tells what data is shown in the graph – horizontal axis (x-axis) which usually shows the independent variable – vertical axis (y-axis) which usually shows the dependent variable

“DRY MIX” can help you remember how to label each axis. D= dependent or Responding variable goes on the Y axis; Manipulated or Independent variable goes on the X axis.

LINE GRAPHS When to use a line graph… – when your data is continuous & specific… you want to show a trend or change over time – examples: time, height, weight, length, volume, pressure, distance, temperature, speed, etc… when using a line graph, the axes must have equally spaced intervals in a measurement depending on the range of the values in the data

each point on the line graph has two values, one for the horizontal axis and one for the vertical axis. a line graph may have two or more lines plotted on it if there are multiple sets of data measured during the same experiment – if two sets of data are plotted, you must include a key to show which line represents each set of data

Label Dependent Variable (units) Label Independent Variable (units) horizontal axis (x-axis) vertical axis (y-axis) Title D R Y M I X Line Graphs

BAR GRAPHS When to use a bar graph… – when you want to show a comparison of your data can be averaged, grouped, or put into categories – examples: models of cars, brands of hair spray, types of fabric, favorite foods, etc… when using a bar graph, the independent variable is displayed along the x-axis (horizontal) and the dependent variable is shown on the y-axis (vertical) the bars in a bar graph should be of equal size and should be evenly spaced each bar should be different either in color or pattern you must include a key to show what each bar on the graph represents

Label Dependent Variable Label Independent Variable horizontal axis (x-axis) vertical axis (y-axis) TITLE KEY Group 1 Group 2 Group 3 Group 4 Bar Graph

Application INTERPRETING GRAPHS- In physics, a graph is “worth a thousand numbers”. A great deal of information can be obtained by looking and interpreting graphs describing motion (displacement, speed, velocity, and acceleration).

Interpret The Graph Below: The graph shows that the object’s distance increases as time passes. The object is moving and so it has velocity. The straight line shows it is a constant (not changing).

Interpret The Graph Below: The graph shows that the object’s velocity does not change as time passes. It shows constant velocity.

Interpret The Graph Below: The curve in the graph shows that the object’s velocity is changing as time passes. This is acceleration.

Application Distance vs. Time Graphs- To the right is a typical graph displaying Distance vs. Time. One or more objects may be graphed at one time, so you can compare the relative positions, speeds and displacement as they relate to each other. Directions: Answer the following questions as they apply to the Motions graphs and diagrams. 1. What does the slope of each line on the graph tell you? The speed each runner is moving

170 Interpreting Graphs 169 2/10/2016 Starter: What is the difference between speed and velocity? Application Notes Glue here when done Connection : Complete Ws Exit: A plane traveled North 1500 miles in 5 hours. What is the plane’s velocity? Interpreting Graphs 2/10/2016 Practice : Between which two points is there a constant speed? EQ: What forces can change the motion and speed of an object, and how are those forces used to make our world lives easier?