AP PHYSICS
MONDAY 14.08.25
10
STANDARDS: KINEMATICS 1D
8
& 2D: BIG IDEA 3
6
LEARNING OBJECTIVE:
SWBAT PERFORM A VARIETY y(m) 4
OF CONVERSIONS
Warm Up
Find the distance and
displacement of a person
walking from the green to
red dot.
2
Agenda:
1. Warm Up
2. Presentations postponed until Tuesday
2
4
6
8
10
x(m)
3. Conversion Skills Packet
Homework
Speed and Velocity Practice
AP PHYSICS
TUESDAY 14.08.26
STANDARDS: KINEMATICS 1D & 2D: BIG
IDEA 3
LEARNING OBJECTIVE: SWBAT GET AN
IDEA ABOUT HOW FAST DIFFERENT
DIFFERENT RUNNING ACTIVITIES ARE
USING METRIC.
Warm Up
convert 40 nm->m
Agenda:
1. Warm Up
2. Review Conversions CW
3. Constant Motion Lab
Homework
Finish Lab
AP PHYSICS
WEDNESDAY 13.08.27
Warm Up
2x104+3x103+8x103/2x101
STANDARDS:
KINEMATICS 1D & 2D: BIG
IDEA 3
LEARNING OBJECTIVE:
SWBAT SWBAT GET AN IDEA
ABOUT HOW FAST
DIFFERENT DIFFERENT
RUNNING ACTIVITIES ARE
USING THE METRIC SYSTEM
Agenda
1. Warm up
2. Review HW
3. Lab Outside
Homework
AP PHYSICS
THURSDAY
13.08.28
STANDARDS: KINEMATICS
1D & 2D: BIG IDEA 3
Warm Up
If you were running at 12
m/s, how long would it
take you to run a mile?
RST.11-12.4 MEANING OF SYMBOLS, KEY TERMS,
TECHNICAL JARGON
PROBLEM SOLVERS
OBJECTIVE: SWBAT
ANALYZE & GRAPH THE
VELOCITY OF AN OBJECT
FALLING AT A CONSTANT
SPEED.
Agenda
1.
Warm Up
2.
Review constant speed lab
3.
Coffee Filter Lab
Homework
KAP#1
WHY GRAPH?
-
Finding Mathematical Relationships
-
Predict future results with minimal testing
What important information can be extracted from a graph?
-
slope of the graph
-
equation of the curve that best fits the data
-
The area underneath the curve between points of interest.
WHAT IS SPEED ACTIVITY?
Use a ruler, tumblebuggy, and a timer to collect speed data. We are trying to
answer the question “What is speed? ” by collecting data and interpreting graphs.
1.
First, write a procedure for your experiment.
2.
Next, carry out that experiment with at least 5 trials.
3.
Graph your data & find the equation of the best fit line.
4.
Come up with a written and mathematical definition for speed.
RULER CONVERSIONS
100 centimeters = 1 meter
1000 millimeters = 1 meter
In general, the prefix centi- means 1/100
In general, the prefix milli- means 1/1000
Convert the following
1. 0.5 m -> cm
6. 25m-> mm
2. 0.5 m-> mm
7. 4000 mm->m
3. 5.0 cm-> m
8. 6x106 cm ->m
4. 20.0mm->m
9. 3x10-2m-> mm
5. 7 m-> cm
10. 8x10-5m->cm
11.* 100 cm ->mm
Sample Conversion: 50 mm->m
1m
50mm *
=
1000mm
1m
50 *
= 0.05m
1000
SPEED PRACTICE HOMEWORK
1. Find the speed of a car that moves 20 meters in 10 seconds.
2. Find the speed of a plane that moves 180 km in 2 hours.
3. Find the distance traveled of a rocket moving 4 kilometers per second for 4
minutes.
4. Find the time it takes for a car to travel 40 meters at 12m/s.
5. Find the distance traveled by a fly traveling at 7m/s in for 70 s.
1km=1000m
1 hr=60 min
1 min=60 sec
HOMEWORK
Create a drawing, a short video
demonstration, a problem (with solution), or
other presentable demonstration that
illustrates the difference between distance
& displacement OR speed and velocity
SPEED is called scalar because it does not have direction. Speed can get faster or slower,
but in order to go faster you do not need to go in a particular direction. In science we
say speed only has MAGNITUDE. Speed can only increase or decrease, it only has size.
VELOCITY is called a vector because it does depend on which direction an object is moving.
Velocity depends on speed and direction. We say in science it has a magnitude and a
direction.
DISTANCE is how far you go. When you could distance, it doesn’t matter where you go as
long as you keep going. Distance does not depend on the direction you are walking or
moving. Distance is a scalar and only has a magnitude.
DISPLACEMENT – Think of the word displace. To be displaced is to be moved or taken
away from a place. Displacement has a reference point or a starting point and it
measures where you are based on the starting point. This means displacement is a
vector. It has magnitude and direction. It is the straight line distance and direction an
object is from its starting point.
Present on MONDAY, It can be done in groups.
MATH DIAGNOSTIC
1.
3x102 * 7x105 = (write answer in scientific notation)
2.
6.2x104/9x104= (write answer in scientific notation)
3.
convert 10 mm -> m
4.
convert 500 cm-> m
5.
How many significant figures are in the number 06.0010
6.
Solve the following equation for r. F=Gm1m2/r2
7.
Solve the following equation: ½(20kg)(40m/s) 2
8.
Find the horizontal component of a 4 unit long line starting at the origin at an
angle of 30 degrees.
9.
Find the vertical component of a 4 unit long line starting at the origin at an
angle of 30 degree.
10. Find the dot product of two vectors that are 10 units and 4 units in length if
the angle between them is 60 degrees.
11. Find the cross product of two vectors that are 10 units and 4 units in length if
the angle between them is 60 degrees.
12. An object travels 10 meters north is 30 seconds. Find the speed and
velocity.
THE MKS SYSTEM
M(ETER)
K(ILOGRAM)
S(ECOND)
S(YSTÈME)
THE FUNDAMENTAL UNITS
METER
M
KILOGRAM
KG
SECOND
S
AMPERE
A
MOLE
MOL
MATTER
KELVIN
K
CANDELA
CD
LENGTH
MASS
TIME
ELECTRIC CURRENT
QUANTITY OF
TEMPERATURE
INTENSITY OF LIGHT
LENGTH
The length measurements are based on:
T H E D I STA N C E A B E A M O F
L I G H T T R AV E L S I N
1 / 2 9 97 9 24 5 8 S
MASS
M E A S U R E S T H E Q U A N T I T Y O F M AT T E R
M AT T E R I S A N Y T H I N G T H AT TA K E S U P
S PAC E
T H E S TA N D A R D K I L O G R A M M E A S U R E M E N T
I S T H E M A S S O F A N ACT UA L P T- I R A L LOY
CYLINDER KEPT IN FRANCE
TIME
TIME IS SET AND MEASURED
B A S E D O N 9 ,1 9 2 , 6 31 , 7 0 0
O S C I L L AT I O N S O F T H E R A D I AT I O N
F R O M A C E R TA I N T R A N S I T I O N I N
A C E S I U M AT O M
DERIVED UNITS
(COMPOSED OF MULTIPLE
BASIC UNITS)
AREA
VOLUME
DENSITY
KGM-3
SPEED
M2
M3
KG/M3 OR
M/S OR MS-1
METRIC SYSTEM CHART
Prefix-Unit
Symbol
How many are
in a meter?
Mega-seconds
Ms
1Ms=106s
Kilo-seconds
ks
1ks=103s
(1ks=1000s)
_____seconds
_s
------
Centi-seconds
cs
102 cs=1s
(100cs=1s)
Milli-seconds
ms
103ms=1s
(1000ms=1s)
Micro-seconds
s
106s=1s
Nano-seconds
ns
109ns=1s
Note: Any metric
system unit of
measurement can be
used in this way. If a
question asks you for g
(grams) , you would
would replace every s
and seconds with g
and grams on this
chart.
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.
1 STEP CONVERSION
1. Example. A. Convert 1000 m -> km
Step 1:
1km
1000m*
Step 2:
1000m
=
1km
=1km
 The question asks me to
convert 1000m to km so how did I know to use the
1000
1000 *
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.
EXAMPLE 2
B. Convert 50 mm-> m
1m
50mm *
=
1000mm
1m
50 *
= 0.05m
1000
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
1g
1x10 ng
6
6mg *
*
= 6x10 ng
1000mg
1g
9
1 1x10 ng
6
6*
*
= 6x10 ng
1000
1
9
CONVERSION PRACTICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
100,000 kg -> g
50,000 g-> Gg
0.037 mK -> K
57x103 Mm -> m
3x102μm -> m
30 cm-> mm
20 mm->μm
10 μm->nm
50 kg -> ng
200 nm-> Gm
50cL->kL
20ms->ks
0.047 Ms->ks
4x10-6 kg->mg
SCIENTIFIC NOTATION PRACTICE
1.
Convert 0.0000024 into scientific notation.
2.
Convert 0.0009291 into scientific notation.
3.
Convert 42,000 into scientific notation.
4.
Convert 7.2x10-6 into standard form.
5.
Multiply 1.5x10-3*4x10-5
6.
Multiply 2x106*3x10-2
7.
Multiply 6x10-9*4x105
8.
Solve 3x102/1.5x101
9.
Solve 6x107/4x10-2
10.
Solve 5x10-2/2.5x102*1x101
11. Solve 4x103+3x103
12. Solve 7.2x10-4+2.1x10-4-3.4x10-4+1.1x10-4
13. Solve 3.7x102+2.7x102-8.1x102
14. Solve 4x104+4x103+4x102
15. Solve 25+7x101-14.
RULER CONVERSIONS
100 centimeters = 1 meter
1000 millimeters = 1 meter
In general, the prefix centi- means 1/100
In general, the prefix milli- means 1/1000
Convert the following
1. 0.5 m -> cm
6. 25m-> mm
2. 0.5 m-> mm
7. 4000 mm->m
3. 5.0 cm-> m
8. 6x106 cm ->
4. 20.0mm->m
9. 3x10-2m-> mm
5. 7 m-> cm
10. 8x10-5m->cm
11.* 100 cm ->mm
Sample Conversion: 50 mm->m
1m
50mm *
=
1000mm
1m
50 *
= 0.05m
1000
KAP #1
Study Significant Figures from your book on your own.
Answer the following questions: pg. 19 9,10,11,13,14
Come on Tuesday ready to ask questions (We do not have time to spend a whole
class on them, so when studying significant figures you should be able to answer
the following questions if you’ve done a good job.
1. What are they? What does the book mean by a significant figure?
2. When are significant figures used?
3. What benefits do using significant figures give to scientists and science students?
4. How are they used? (How do you use them in problem solving?)