Email: wchan@philasd.org
Office Hours: Wednesday and Thursday 3:05pm-4:30pm, or by appointment

Monday, January 31, 2011

Monday January 31

Today, we continued to solve problems related to work.

DO NOW:
1. What is the objective of today's class?
2. What is the equation for work?
3. Why does your weight change when you go up to the moon?
4. What force do you need to overcome to lift something? What force do you need to overcome to set something in motion?

ANNOUNCEMENTS:
1. Last week's homework (HW Packet 1) is now due THIS WEDNESDAY.

CLASS WORK:
If you are in my 1st and 2nd period classes (and were in school last Wednesday), you guys worked on this Mixed Equations Worksheet. Write your answers to the problems IN YOUR NOTEBOOKS.

If you are in my 5th, 6th and 8th period classes OR you did not come to school last Wednesday, you should complete this handout. If you have trouble with the front, see the master notebook when you come back to class. I am unable to upload powerpoint at this time. When you are done with this handout, staple it into your notebook.

Wednesday, January 26, 2011

Wednesday January 26

Today, all classes were dismissed at 12:00pm noon.

Our objective was to solve problems involving work.

We will continue this when school resumes.

Correction!!!
Your homework packet will be due on next Wednesday.

Tuesday, January 25, 2011

Tuesday January 25

Today's objectives: (1) Distinguish between work and force (2) Solve problems involving work


We took 3 slides of NOTES today; they begin on slide 7:



CLASS WORK:
Station 1: Mr. Follman has a mass of 75kg. Calculate his weight in newtons on Earth.
Station 2: What's one difference between weight and mass?
Station 3: List the equations for work, weight, force, speed and velocity.
Station 4: Calculate the work you do when you pull a suitcase 20m across the room with a 5N force.
Station 5: A car slows down by applying a force of 200N over a distance of 50m. Calculate the work done by the brakes of the car.
Station 6: Calculate the work you do by lifting your 10kg backpack a distance of 3m into the air. Hint: Calculate the force of gravity on the backpack first.

HOMEWORK:
Answer Tuesday's problems on the "Homework Packet 1".
Here is the link for the handout: Homework Packet 1

Monday, January 24, 2011

Monday January 24

Today's objectives were to: (1) Define work (2) Distinguish between work and force

Here is the powerpoint below:


The Intro to Work handout is below:
handout

Make sure you staple this handout into your notebook when you're done.

Announcements:
- This 2nd marking period ends tomorrow at 4:00pm.

Homework:
- Correct your Unit 4 Test. For all the questions you got wrong, explain why the correct answer is correct.

2nd marking period Extra Credit options (for students who currently have a 50% or higher):
Each option is worth 2-5 points.
You can complete more than 1 option.
On the paper you turn in, please write the option number above the work.
DUE TOMORROW BY 4:00 PM.

(1) Textbook pg. 338 #1-11 (make sure to write the full answer)
(2) Draw free-body diagrams for 5 objects around your house.
(3) Textbook pg. 368 #1-5; pg. 371 #45
(4) Write 5 more facts from Chapter 12.
(5) Write 3 things that involve FORCE but do NOT involve work (ex: pushing a bricking wall). Write 3 things that involve work (ex: pushing a textbook 5 inches across the table)
(6) Write a 2 paragraph reflection on this 2nd marking period: What did you learn? What do you think you could've done to get a higher grade? etc ....
(7) Flip through your Unit 4 notes. Write down 10 vocab words. Write the definition, example or equation for each.
(8) Textbook pg. 340 #30 and 32

Friday, January 21, 2011

Friday January 21

Today, we did Achieve 3000.

Your notebook check is TODAY. Make sure you give me your notebook on Monday when you return!

IMPORTANT ANNOUNCEMENT: This second marking period will end on TUESDAY. You have until TUESDAY to make up any work or hand me any extra credit assignments.

Thursday, January 20, 2011

Thursday January 20

Today we took the Unit 4 Test.

If you were absent from class today, you have until TUESDAY of next week to make it up. You will need to come see me during advisory, after school or during your 4th period lunch. You will not be allowed to make it up in class.

DO NOW:
1. What is the objective of today's class?
2. When is your notebook check? (Answer: tomorrow!)
3. What is the equation for speed? For force?
4. If the hallways of Sayre HS were frictionless, would that affect your movement around the school? How?

HOMEWORK:
Write 5 facts from Chapter 12 in your textbook.

Wednesday, January 19, 2011

Wednesday January 19

Today we reviewed for the Unit 4 Test TOMORROW.

DO NOW:
1. What is the objective of today's class?
2. What is a force?
3. Momentum depends on 2 things: ____ and _____.
4. You slap your friend's face. What is the action force? What is the reaction force?
5. When is your Unit 4 Test?

CLASS WORK:
You will do the following in your notebook. Answer all the questions at Stations 1-6:

Station 1
1. Match the following quantities to their appropriate units. A quantity can have more than 1 matching unit.
2. A fat cat crawls 10 meters in 5 minutes. What was the cat's average speed?
3. What is the difference between speed and velocity?

Station 2
1. The following data chart describes the motion of a runner. Plot it on a X-Y graph.
              Time (s)       Distance (m)
                   0                     0
                   5                   10
                  10                  20
                  15                  20
                  20                  40
2. During what time period (other than at time zero) is the runner motionless?
3. What is the runner's average speed for the entire 20-second period?

Station 3
1. State Newton's 1st Law of Motion.

Station 4
1. Fill-in-the-blank: ____ = mass x acceleration
2. Your bike has a mass of 9kg. You accelerate at a rate of 2 m/s2. Calculate the net force that is accelerating the bike.
3. you are pushing your short 100 kg cousin on the swing. His tall 200 kg friend then runs up to you and ask you to push him instead. He said that because he's taller, he is less dense and thus requires less force to move. Do you agree? Why/why not?

Station 5
1. State Newton's 3rd Law of Motion?
2. Identify the action/reaction force pairs in the following situations:
a) Jill pushes (exerts a force on) a table.
b) A rocket takes off from the ground.
c) Sam is sitting on a chair.

Station 6
1. What is momentum?
2. Fill-in-the-blank: Momentum depends on two things: ____ and ____.
3. Which statement best describes a force that the driver and passenger experience together in a car?
a) Velocity moves them forward against their seat belts when the brakes are applied?
b) Momentum moves them forward against their seat belts when the brakes are applied.
c) Velocity pushes them against their seats when the car is moving at a constant speed.
d) Momentum pushes them against their seats when the car is moving at a constant speed.

HOMEWORK:
Finish your Unit 4 Test Study Guide! Your test is tomorrow!

Tuesday, January 18, 2011

Tuesday January 18, 2011

There was a 2-hour delay today. Therefore, the Unit 4 Test will now be on THURSDAY. The Unit 4 Test Study Guide will also be due on Thursday.

Today we reviewed Newton's 3rd Law of Motion.

Do Now:
1. What is the objective of today's class?
2. Newton's 1st Law: An object at rest/in motion will stay at rest/in motion until ________.
3. Newton's 2nd Law: As the mass of an object increases, the _______ needed to move it increases.
4. Force = _____ x _______.
5. Newton's 3rd: For every action (force), there is an equal yet opposite ______.

Example of Newton's 3rd Law: http://www.youtube.com/watch?v=b9qvt_LS5sg
The action force is the cannonball firing, the reaction force is the cannon itself moving backwards.

Class work:
Constructed Response. Pick one of the following to answer for extra credit:
1. How does a swimming fish demonstrate Newton's 3rd Law?
2. How does a floating boat demonstrate Newton's 3rd Law?

Tonight's Homework:
Work on the Unit 4 Test Study Guide

Friday, January 14, 2011

Friday January 14

Today, we reviewed Newton's 3 Laws of Motion.

DO NOW:
1. What is the objective of today's class?
2. Newton's 1st Law: an object at rest will stay at rest until _____.
3. Newton's 2nd Law: Force = ________ x ____________.
4. Newton's 3rd Law: For every action (force), there is an equal yet opposite ___________.
5. What is momentum?


CLASS WORK:
(1) Flip through a magazine or newspaper. Cut out a picture.
(2) Paste the picture onto a piece of paper.
(3) Relate that picture to each of Newton's Laws of Motion.

This class work is worth 8 points. Place it in the Assignment Box when you're done.

HOMEWORK:
Your homework tonight is to begin working on the Unit 4 Test Study Guide. This study guide is worth 10 points and is due on Wednesday January 19th (the day of your test). Your test will be VERY similar to this study guide.

To get the study guide, follow these steps:
- Go to: www. engrade.com/sayremschan
- Click on your class period
- Find the assignment: "U.4 STUDY GUIDE"
- Click on the attachment and print.