# A Physics Toolkit Do Now Chapter Objectives Chapter 1. 1 Mathematics & Physics Chapter 1.1 Vocabulary

## A Physics Toolkit Do Now Chapter Objectives Chapter 1. 1 Mathematics & Physics Chapter 1.1 Vocabulary

Maher, Rory, Financial Correspondent has reference to this Academic Journal, PHwiki organized this Journal A Physics Toolkit Chapter 1 Pgs 2 – 29 Do Now H in addition to in any signed syllabi or safety contracts. Have covered books on your desk. Take a small white board & marker What is physics Chapter Objectives Use mathematical tools to measure in addition to predict. Apply accuracy in addition to precision when measuring. Display in addition to evaluate data graphically.

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Chapter 1. 1 Mathematics & Physics Demonstrate scientific methods. Use metric system. Evaluate answers using dimensional analysis. Chapter 1.1 Vocabulary Physics Dimensional analysis Scientific method Hypothesis Scientific law Scientific theory What is physics Branch of science that involves the study of the physical world, energy, matter in addition to how they are related What are some of the topics studied in physics

Mathematics The language of Physics Why do you think mathematics is so important in physics Equations: tool as long as modeling observations in addition to as long as making predictions. Do Now  HW on Desk Estimate the order of magnitude in meters as long as each of the following measurements. Diameter of tennis ball Length of tennis racket Width of tennis court Length of tennis court The height of a tennis net

SI: Système International dUnités SI is based on the power of 10 SI has 7 base units We will concentrate on only the first three as long as now Page 5 in textbook SI Prefixes Page 6 in textbook Discussion: Why do scientists use the metric system, instead of the English or some other system Why is it important to have an agreed upon system of units

Dimensional Analysis Method of treating units as algebraic quantities, which can be cancelled. Conversion Factor: is a multiplier that is equal to one Example: 1 kg = 1000 g Choose a conversion factor that will cancel the units May need to use more than one conversion factor Practice Convert 1 year into minutes. Convert 1,000,000 seconds into weeks. Practice A car is moving at a speed of 90 km/h. What is the speed of the car in m/s You are riding your bicycle down the hill at 15 m/s. What is your speed in km/h

Do Now: What is the scientific Method Systematic method of observing, experimenting, in addition to analyzing to answer questions about the natural world Scientific Method Scientific Method Hypothesis- educated guess about variables Must be testable

Chapter 1.2 Measurement Distinguish between accuracy in addition to precision Chapter 1.2 Vocabulary Measurement Precision Accuracy Do Now Complete the following conversions using dimensional analysis 120 km/h to miles per hour 50 km/h to m/s 30 m/s to km/h 65 miles per hour to km/h 1 mile is 1.610 km

Measurements Comparisons between an unknown quantity in addition to a st in addition to ard Measurements are used to quantify observations Measurements often allow us to derive relationships between two quantities St in addition to ard as long as kilogram in addition to a meter Accuracy vs. Precision Precision What is the measurement at the red line in meter, centimeters, in addition to millimeters What determines the precision of a measurement How does the last digit differ from the other digits in a measurement

Chapter 1.3 Graphing Data Graph the relationship between independent in addition to dependent variables Interpret graphs Recognize common relationships in graphs Do Now A cars odometer measures the distance from home to school as 3.9 km. Using string on a map, you find the distance to be 4.2 km. Which answer o you think is more accurate How does the last digit differ from the other digits in the measurement Chapter 1.3 Vocabulary Independent Variable Dependent Variable Line of best fit Linear relationship Quadratic relationship Inverse relationship

Experimental Design Purpose Determine relationship between two different variables Controlled Experiments Manipulate only one variable in an experiment Observe its effect on a second variable Hold ALL other variables in the experiment CONSTANT Variables Any factor that might affect the behavior of an experimental setup. Independent Variables Factor that is changed or manipulated during the experiments Always plotted on the x-axis Time is usually the independent variable Dependent Variables Factor that depends on the independent variable Always plotted on the y-axis Recording Data Raw data is recorded (ink) on a data table immediately as it is collected in the lab. Data Table Independent variable in leftmost column of the data table Every column is labeled with the name of the variable being measured with the units in parentheses below the variable name. Values in table do not have units. Same number of decimal places in each column Construct data table be as long as e collecting the data

Do Now H in addition to in any signed syllabi or safety contracts. Have covered books on your desk. Take a small white board & marker Write two lab safety rules on your whiteboard!!! Practice Problems 5, 6, 7, 8, 13, 17, 18, 21, 23, 24, 26, 37, 39, 40, 43, 45, 46, 57, 61, 67, 69, 84, 85, 89

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