1. AP Physics Tuesday Standards: Motion Objective: SWBAT use significant figures when problem solving.
Warm Up
A person runs a 15km race in 4 hours. How fast is the person going in m/s? Don’t forget to convert km->m and hr->s.
Agenda
Warm Up
Review HW
Significant Figures Rules
Significant Figures Practice
Homework
Significant Figures worksheet

2. AP Physics Wednesday Standards: 1a Motion in 1 dimension Objective: SWBAT discover the essential components of motion by designing their own inquiry.
Warm Up
A car moving at a speed of 22.5 m/s travels for 25s, how far did it travel? Use sig figs.
Homework
Study for Quiz Friday
Lab Write up Due Monday
Agenda
Warm Up
Correct Homework
Distance,Displacement,Speed&Velocity
Constant Velocity Car Lab

3. AP Physics Friday Standards: 1a: Motion in one dimension Objective: SWBAT solve average speed, displacement & velocity problems.
Warm Up
What is the slope of your Tumblebuggy Lab graph equivalent to? (This question is not asking for numbers.)
Agenda
Warm Up
Quiz 2
Distance&Displacement, Speed&Velocity
Practice Problems
Homework
Page: #3 Average Velocity & Displacement
Quiz 2

4. Significant Figures Rules: Digits from 1-9 are always significant
Example: 129 has 3 sig. figs.
Zeros between two other significant digits are always significant.
Example: 5,007 has 4 sig. figs.
Trailing zeros are significant only if the number has a decimal point.
Example: has 4 sig. figs., but 100 has 1 sig fig.
Leading zeros are never significant.
has 2 significant figures.
Practice: a.0.04, b.221.0, c.107 d. 127,000

5. Multiplying & Dividing Significant Figures
Rules: When multiplying or dividing, your answer may only show as many significant digits as the multiplied or divided measurement showing the least number of significant digits. Ex cm x 3.10cm x cm = cm3 But where should we round? We can have only 3 sig. figs. because that is our constraint cm has the least # of sig. figs. and it has 3.
Practice: a.1.00/3, b. 12.0/4.000, c. 101* , d. 12/1.2

6. Adding & Subtracting Significant Figures
Rules: When adding or subtracting, your answer can only show as many decimal places as the measurement having the fewest number of decimal places. Example: 3.76g+14.83g+2.1g=20.69g When you add the numbers vertically you automatically line up the decimal places. The one with the least number of decimal places is your constraint. That is 2.1g. So your answer will have 1 decimal place. 20.7g practice: , ,

7. Practice with Sig Figs Find the correct answer in sig figs
Find the number of sig figs
Find the correct answer in sig figs
0.02
0.020
501
501.0
5,000
5000.
6,051.00
0.0005
0.1020
10,001
1.0x103
2.06x106
0.0006x104
1.206x10-3
150x10-9
1.11x3.0
125x10
121x0.10
121x0.1
25.0/5.0 x1
127,500x2
2.222/2.00
9x8
66/33
5.413/0.10
4.75x103x1.0x10-2
2.0x104x
20,000x107x
4.0761x103x
Round to the correct # of sig figs.
=69
=69
=598.8
56-35
46x12=552
3.24x5.63=
0.024x0.063

8. Motion of the Tumblebuggy.
This lab requires you to answer the following question using the scientific method. A lab report will be required of each individual: Due Monday Sept. 10th. You may work in pairs.
What is motion?
Design your lab and collect data. You need at least 10 data points.
Don’t just wing it if you don’t know something.
Ask questions.
Research using your textbook or the internet.
or tweet me over the weekend if necessary.
If everyone gets the lab in on time, I will allow rewrites, but just for this lab. This is a 1 time offer. If one person is late, nobody gets a rewrite.
Today is your only day to do the lab. If you don’t finish, you will not have time on Friday during class. You’ll need to come before school, after school, or during lunch.

9. Distance,Displacement,Speed,Velocity
distance vs. displacement -- walking speed vs. velocity -- running average velocity vs. instantaneous velocity – changing speeds vs constant speed.