AP PhysicsTuesday 13.08.13Standards: NAObjective: SWBAT solve equations.Agenda1. Warm Up2. Syllabus 3. Solving Equations

HomeworkAP Physics Worksheet1. a-h2. a-l

Warm Up

Why are you taking AP Physics?

AP PhysicsWednesday 13.08.14Standards: NAObjective: SWBAT convert from standard form to scientific notation and back.

Agenda1. Warm Up2. Correct Homework3. Conversion Refresher4. Conversion Practice

HomeworkAP Physics Worksheet3, 4. a-n

Warm Up

Convert my height 5’’9’ into into meters. If you need to search for the conversion factor on the internet, go ahead.

AP PhysicsThursday 13.08.15Standards: NAObjective: SWBAT convert from standard form to scientific notation and back.

Agenda1. Warm Up2. Correct Homework3. Extra Practice Equations &

Conversions4. Geometry & Trig Skills are pushed

back to Friday.

HomeworkExtra Practice Equations & Conversions

Warm Up

Solve for Fap .(ma=Fap-μmg+mgcosθ)

AP PhysicsFriday 13.08.16Standards: NAObjective: SWBAT convert from standard form to scientific notation and back.

Agenda1. Warm Up2. Correct Homework3. MKS System4. Geometry & Trig Skills are pushed

back to Friday. HomeworkGeometry & Trig Skills5a-f, 6a-f, 7 a-h

Warm Up

Principles for Solving Equations

The following are guidelines to keep in mind when attempting to solve equations.

Your Goal: The Big Picture

• How do I isolate the variable on one side of the equation?

Techniques

• What you do to one side of the equation you must do to the other side.

-7-7

Techniques 2• In more complicated equations

isolate your variable step by step.

1. First make sure the term with the variable is by itself.2. Next make sure the variable is by itself3. Finally get rid of any exponent attached to the variable. 4. Optional: Lastly you might want to simplify or clean up the solution.

-10z-10z

77

1

2

3

4

The MKS System

M(eter)K(ilogram)S(econd)

S(ystème) I(nternationale)

The Fundamental Unitsmeter m lengthkilogram kg masssecond s timeampere A electric currentmole mol quantity of matterkelvin K temperaturecandela cd intensity of light

LENGTH

The distance a beam of light travels in 1/299792458 s

The length measurements are based on:

MASSMeasures the quantity of matter

Matter is anything that takes up space

The Standard kilogram measurement is the mass of an actual Pt-Ir alloy cylinder kept in France

TIMETime is set and measured based on 9,192,631,700 oscillations of the radiation from a certain transition in a cesium atom

Derived Units(composed of multiple basic units)Area m2 Volume m3

Density kg/m3 or kgm-3

Speed m/s or ms-1

Metric System Chart

Prefix-Unit Symbol How many are in a meter?

Proportion used for conversion into 1

Proportion used for conversion into 2

Mega-seconds Ms 1Ms=106s 1,000,000 s 1Ms

___1Ms__ 1,000,000 s

Kilo-seconds ks 1ks=103s(1ks=1000s)

1,000 s 1 ks

___1ks__ 1,000 s

_____seconds _s ------ ------ -------

Centi-seconds cs 102 cs=1s(100cs=1s)

100 cs 1s

__1s__ 100 cs

Milli-seconds ms 103ms=1s(1000ms=1s)

1,000 ms 1s

__1s__ 1000 ms

Micro-seconds s 106s=1s 1,000,000 s 1s

__1s__

1,000,000s

Nano-seconds ns 109ns=1s 1,000,000,000 ns 1s

_1s__1,000,000,000ns

Chart of Metric System Prefixes

Base unit symbols: K, m, L, A, g, s

Wherever you see an underscore ( ___) insert the Symbol of the base units you will use in your problem.

Example, one type of unit is meters. The symbol for meters is m. Everywhere you see an underscore, insert an m

1 Step Conversion• 1 step conversion occur when you convert from a base unit to

a unit with a prefix or vice versa.• Example. A. Convert 1000 m -> km • B. Convert 50 mm-> m

• In order to do conversions we first set up a proportion and we use a technique called dimensional analysis to evaluate the proportion.

Dimensional Analysis• What is a dimension? • A dimension is just another name for fundamental or base

quantities. • Example: Length, mass, and time are all dimensions. • By analyzing these dimension and performing math on these

dimensions as if they were numbers, we can strengthen our problem solving abilities, and in particular we can do unit conversions very simply.

Back to the Example 11. Example. A. Convert 1000 m -> km Step 1:

Step 2:

• The question asks me to convert 1000m to km so how did I know to use the proportion 1km/1000m?

• Dimensional Analysis. • If I want my units to to be kilometers then I need to set up a proportion so

that meters completely cancel out of the problem and only kilometers are left on the numerator.

B. Convert 50 mm-> m

Example 2

2 step conversions• In 2 step conversion you’re converting from a prefixed unit to

another prefixed unit. Ex. Convert 6mg->ng

• This is called a 2 step conversion because you need to convert into the base unit (g) before you convert to the final prefixed unit.

Example

Convert 6mg -> ng

Extra Conversion Practice1. 100,000 kg -> g2. 50,000 g-> Gg3. 0.037 mK -> K4. 57x103 Mm -> m5. 3x102μm -> m6. 30 cm-> mm7. 20 mm->μm8. 10 μm->nm9. 50 kg -> ng10. 200 nm-> Gm11. 50cL->kL12. 20ms->ks13. 0.047 Ms->ks14. 4x10-6 kg->mg15. 15 miles -> kilometers