 # Welcome to Physics C Instructor: Martin Mathews 562-698-8121 Expectations are on the Course Description page.Course Description.

## Presentation on theme: "Welcome to Physics C Instructor: Martin Mathews 562-698-8121 Expectations are on the Course Description page.Course Description."— Presentation transcript:

Welcome to Physics C Instructor: Martin Mathews 562-698-8121 martin.mathews@wuhsd.k12.ca.us Expectations are on the Course Description page.Course Description Homework assignments are on the course calendar.calendar Write your name inside the front cover of your textbook. Bring your lab fee of \$15 to me beginning tomorrow. Due Friday. 1 Mathews - Unit 1 AP Physics Toolkit

Information Card 2Mathews - Unit 1 AP Physics Toolkit

Philosophy of Instruction for Physics C You are the big kids. You have all had physics before. Your motivations for being in this course vary. Your skill and interest level in different areas of physics vary. I will try to avoid repetition of what you already know, and will occasionally give you at least some choice as to what you work on. 3 Mathews - Unit 1 AP Physics Toolkit

How do I take notes? What am I expected to do? 4 Lecture NotesWork Packet Mathews - Unit 1 AP Physics Toolkit

Physics Toolkit Objectives 1. Students can express units in regular and scientific notation, and convert measurements from one unit to another. 2. Students can rearrange a formula in symbol form to solve for any variable. Students can check their answers using units. 3. Students know to use their calculators to solve the side of any triangle from given information.

Lesson: Physics Toolkit Unit Conversions and numbers. 6 Students can express units in regular and scientific notation, and convert measurements from one unit to another. Mathews - Unit 1 AP Physics Toolkit

Scientific Notation i.e. 4.32 x 10 5 kg 7 Mathews - Unit 1 AP Physics Toolkit Scientific notation is a system for communicating very small and very large numbers. For numbers in the range.001 – 1000, most scientists dont bother. But for numbers larger or smaller than this, it is very useful, and will be a big part of this course. 2 Rules: Rule #1: all stem numbers must be between 1 -10 Rule #2: numbers larger than 10 use positive exponents; numbers smaller than 1 use negative exponents.

Practice makes perfect… 8 Mathews - Unit 1 AP Physics Toolkit ScientificRegular 1.2300 s 2.1.08 x 10 -4 N 3.2.00 x 10 8 km 4.0.0000054 m/s 2 5.108 000 000 people 6.2.1 x 10 6 kgm/s

Guided Practice Time Do the Scientific Notation worksheet to satisfy the following objective: Students can express units in regular and scientific notation, and convert measurements from one unit to another.

Scientific notation and your calculator 10 Mathews - Unit 1 AP Physics Toolkit For your calculator the number 4.3 x 10 4 is written 4.3EE4, 4.3 EXP4. Likewise when your calculator writes 2.1EE-7 as an answer, it means 2.1 x 10 -7, or.00000021. For example, Calc code: 1.2EE4 x 2.2÷1x1÷2EE3x5÷1.4EE-5= 4714285.7… = 4.71EE6

Let the Units Rule! 11Mathews - Unit 1 AP Physics Toolkit Convert 1200.30 seconds into years

Scientific Measurements and Quantities 12 Mathews - Unit 1 AP Physics Toolkit QuantityMetric UnitsCommon other forms Times Lengthm Masskg Derived units

Metric prefix info Metric Prefix Info: followed by either g (grams),s(seconds) or m(meters) FactorPrefixSymbolEquation 10 9 gigaG__1 x 10 9 __ = 1 G__ 10 6 megaM__1 x 10 6 __ = 1 M__ 10 3 kilok__1 x 10 3 __ = 1 k__ 10 0 ___1 x 10 0 __ = 1 __ 10 -2 centic__1 x 10 -2 __ = 1 c__ 10 -3 millim__1 x 10 -3 __ = 1 m__ 10 -6 microµ__1 x 10 -6 __ = 1 µ __ 10 -9 nanon__1 x 10 -9 __ = 1 n__ 10 -12 picop__1 x 10 -12 __ = 1 p__

Changing one system to another 14 Mathews - Unit 1 AP Physics Toolkit some common conversion factors Time 3600s = 1 hour365.25 days = 1 year mass 2.2 lbs = 1 kg16 ounces = 1 lb2000 lbs =1 ton length 2.54 cm = 1 inch 5280 ft = 1 mile=1.67km1 Å = 10 -10 m

Sample problems: 1.How many picograms are there in 3.4 x 10 5 lbs? 2.Convert 23.4 years into seconds 3. Convert the distance to the Sun, 1.5 x 10 11 m into miles.. 15Mathews - Unit 1 AP Physics Toolkit

Guided Practice Time Do the Unit Conversion worksheet to satisfy the following objective: Students can express units in regular and scientific notation, and convert measurements from one unit to another.

Lesson 2 Students can use algebra skills to rearrange formulas for any variable in any equation. 17 Mathews - Unit 1 AP Physics Toolkit Algebra Olympics

Algebra is the most necessary skill for this class. Without a thorough knowledge of algebra you will not be an effective problem solver. If you are rusty on your algebra skills; allow me to simplify. Rule #1: Any operation carried out on one side of an equation MUST be carried out exactly the same to the other side. Rule #2: When a fraction has the same multipliers on the top and bottom of a fraction, these cancel out. 18Mathews - Unit 1 AP Physics Toolkit

Although algebra may seem crazy complicated sometimes, it is really just these two principles, and a ton a practice and patience that is needed. Sample 1 Rearrange this formula for x 19Mathews - Unit 1 AP Physics Toolkit Now practice, practice, practice

Guided Practice Time Do the Algebra Olympics worksheet to satisfy the following objective: 2. Students can rearrange a formula in symbol form to solve for any variable.

Lesson 3 21 Mathews - Unit 1 AP Physics Toolkit Trigonometry Review 3. Students know how to use their calculators to solve the side of any triangle from given information.

22 Mathews - Unit 1 AP Physics Toolkit Soh Cah Toa Sine of an angle is equal to the ratio of opposite side/hypoteneuse of an angle. Cosine of an angle is equal to the ratio of adjacent side/hypoteneuse of an angle. Tangent of an angles is equal to the ratio of the opposite/adjacent sides of a right triangle A B x y z

Sample problem 23 Mathews - Unit 1 AP Physics Toolkit 34m 21° x

Sample problem 2: 24 Mathews - Unit 1 AP Physics Toolkit 12m 76° x

Guided Practice Time Do the Triangles worksheet to satisfy the following objective: 3. Students know to use their calculators to solve the side of any triangle from given information.

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