Welcome to Physics !! Mrs. Ann Nemeck.

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Presentation transcript:

Welcome to Physics !! Mrs. Ann Nemeck

What is Physics? https://www.youtube.com/watch?v=HuZZpJJF71U

Day 1 Laboratory Investigation What you need to know ---- Dimensional Analysis Trig --- SOH CAH TOA Definition and creation of vectors Definition and difference between distance and displacement Pick a Partner – and let’s see what you can remember

Clinometer

Vectors & Vector Diagrams a quantity or phenomenon that has two independent properties: magnitude and direction. An arrow is used to represent a vector

Vector Diagram (Can you calculate the distance? What about displacement?)

Difference between Distance and Displacement !!!

Definitions Distance: Displacement: Also----- how far something has traveled. Displacement: how far something is from where it started. Also----- Distance is a scalar quantity (magnitude). Displacement is often a vector quantity (magnitude and direction). An object's displacement can never be greater than the distance traveled.

Dimensional Analysis Key terms: Key skill: Unit Conversion factor Fractions !!!!! (You did this in Chemistry  )

Key Terms Unit --- Conversion Factor --- a word or abbreviation that comes after a number ; that describes the number EVERY NUMBER IN PHYSICS MUST HAVE A UNIT Ex: 10 miles, 10 dollars, 10 miles/hour Conversion Factor --- A fraction, where the numerator is equal to the denominator, but the units are different. Ex: 100cm/1m, 1mile/5280ft, 1 century/100years

Prefixes Used in SI units

Dimensional Analysis Practice Page 7 in textbook Practice problems 5-8

Significant Figures

Practice Sig Fig’s  Practice problems 9-12 on page 8 in the textbook

Precision vs. Accuracy Degree of exactness = precision How well the results of measurement agree with a ‘real’ value = accuracy

Graphing Data Copy: ‘Problem Solving Strategies: Plotting Line Graph‘ Page 16 in your textbook

Graphing Relationships

Linear Relationship

Nonlinear Relationships

Inverse Relationship (nonlinear)