Dynamics: Some Types of Forces and Free-Body Diagrams

For today's class, we started the class by discussing the table found on page 36 and answering the questions related to Newton's second law of motion on pages 37 and 38. We later on discussed some types of forces (page 9) and free-body diagrams (pages 13-16).

Page 36: The table shows observations, predictions, assumptions, and diagrams of Galileo's Thought Experiment on Motion. The overall experiment states that an object will remain at rest or in uniform motion unless acted on by an external force.

Types of Forces:
a. Friction- contact force that acts to oppose sliding motion between surfaces.
b. Normal- contact force exerted by a surface on an object.
c. Spring- restoring force; the push or pull a spring exerts on an object.
d. Tension- pull exerted by a string, rope, or cable when attached to a body and pulled taut.
e. Thrust- forces that move objects such as rockets, planes, cars, and people.
f. Weight- long-ranged force due to gravitational attraction between 2 objects, generally earth and an object

Free- Body Diagrams:
What is a free-body diagram? A free- body diagram is a diagram that represents an object and all the forces acting on it. To learn how to draw free-body diagrams check pages 13 to 16. These pages provide strategies on how draw a free- body diagrams and some situations in which free- body diagrams can be drawn.

Ms. K then told us to answer pages 27 and 40. We later on checked our answers and then Ms. K assigned us to do pages 41 and 42 for homework. She also gave back our kinematics test.
*for pages 41 and 42- do not do the drawings with an inclined plane
*Also remember since it's staff meeting day, there will be no afternoon classes.

Next Scribe for Wednesday's class: Dwightlord

Dynamics: Four Fundamental Forces and Newton's Laws of Motion

Today's class; Friday, February 25, 2011

We started off the class by waiting for Ms. K to find a movie she was suppose to show us about Newton's Laws of Motion I believe. Unfortunately she was not able to find it so we went ahead and started on our next unit; Dynamics. We were given another ivory booklet labeled "Grade 11 Physics. Dynamics."

Our first task was to read from pages 3 to 7, with the headlines being; The Four Fundamental Forces, Newton's Laws of Motion and a brief summary of the 4 pages.

Ms K mentioned that we will only be focusing on The Gravitational Force and The Electromagnetic Force for this grade 11 course, and not so much of The Strong Nuclear Force and The Weak Nuclear Force.

All concepts read from pages 3 to 7 should have been able to help us finish page 39, "Chapter 5 Study Guide" which was our second task. We had approximately 10 to 15 minutes to finish this page and if we were finished, we were to start on pages 34 and 35, "Chapter 3: Newton's First Law - Inertia."

Once the clock hit Helium, says Ms. K (but was actually at Hydrogen) we corrected these 3 pages.

For homework, Ms. K assigned us to read page 36 and finish pages 37 and 38. She said this shouldn't be hard for us to finish so we should get it done.

One last thing, we did not get our tests back because there are still 2 more people who have to write the test on Monday.

Have a nice weekend! Next scribe will be chocnut

Today's Class

We have answered the review problems on the green text book on pages 60-61; 81 numbers 14,21,24 which is about solving for velocity, distance, graphing (rise/run) , displacement, getting areas on the graph (1/2 b h),(b x h) and acceleration. Also, we were given a worksheet about independent, dependent variables and graphing in which we handed it in at the end of the class. Mostly we just had a review for the unit test for this day so best of luck to everyone tomorrow.

I guess that's all, be sure to review :D:D:D gl.

Karla shall scribe next :>

What we did This day

These are the things we did in today's class:

• We answered the homework form last week which is pages 43 and 44 in the Kinematics booklet.
  
• Ms. K made us answer numbers four and five on page 44 on a separate sheet of paper. It was sort of confusing from my point of view but we managed to answer both. She tested us on what we know so far so that we'll be better prepared for the UPCOMING TEST ON THURSDAY (i think) about what we have learned so far about Kinematics.
• We worked on some practice questions in the green textbook and i think we are going to answer them tomorrow. Here are the questions:
• p60 # 14
• p61# 21-24 -----im not sure
  
• p82# 3
• p83# 8, 10 and 11
  
  
  
  
  VaNiLLa_iScream is the next scribe
  

February 18, 2011

At the beginning of class today, I sold one of my chocolates to a classmate of mine.

.. Oh, and Ms. K also helped us complete the study guide for chapters 3 and 4 in the textbook, as well as reminding us the formulas for acceleration, displacement of an accelerating object, and final velocity. She then gave us an insight on calculating the instanteous velocity of a position-time chart, using the "rise-over-run" formula, and were given practice sheets to work on together. By the end of class, we were assigned pages 43-44 in the kinematics booklet to finish by Tuesday. But because we have Monday off, feel free to procrastinate until then. Enjoy your long weekend everybody! :D Just kidding, don't procrastinate. But enjoy your weekends anyhow~

BRYAN SHALL BE THE NEXT SCRIBE~

February 17, 2011

What we did in class today:

Today, at the beginning of the class Ms. K introduced to us a motion sensor and showed us how to use it and what it does. This device was used to test our knowledge on position-time and velocity time graphs. Our other option rather than trying out this device was to continue on with our previous Practice questions on page 55 #13-19, in the green textbook. Lastly, we were able to grab a new worksheet Chapter 3 Study guide worksheet for practice. If you have any questions about the practice questions in textbook or Study Questions, we will be going through these tomorrow in class. Make sure to show up for class so you don't miss anything. :)

Ps. The next scribe is Jackson!

February 16, 2011

What we did in class today.

For half of the class we went over the answers for page 26 (Position Vs. Time graphs), page 28 (Velocity Vs. Time graphs), and page 39 and 40 (Properties of vectors) in our kinematics booklets. For the rest of the class we used the green textbook and read pages 54 and 55 then answered questions 13 - 19 on page 55. Most people did not finish so do not fret.

I assign Food (Karrina) to be the next scribe for tomorrow!

What We Did In Class Today

Today, we had a substitute teacher named Ms. Hall.

• At the beginning of class we went over the rest of pages 13 - 14.
• We read pages 15 - 18 and Ms. Hall kindly explained everything to us, giving examples and teaching it to us.
• We were assigned to do "Transparency 2-4" on page 25 - 26, "Transparency 3 - 1" page 27 - 28, and "Properties of Vectors" on page 39 - 40 in the Kinematics booklet.

That's pretty much all that we did in class today guys (:

Make sure that you do your work!

P.S. Nathaniel is the next scribe :D

February 14, 2011

What we did in class today ._.

• At the beginning of the class we got our assignments about jobs that involved physics handed back to us. We also handed in the assignment "Appendix 3.6: Describing Motion in Various Ways."
  
• After that we, turned to page 23 in the Grade 11 Physics Kinematics book and looked over vector subtraction. We then had some class time to do the 5 questions on page 24 related to vector subtraction which we went over right away.
  
• After that Ms. Kozoriz went over different types of graphs. On a distance - time graph, a parabola shows a change in velocity where as a straight line shoes a constant or linear motion. We also looked at the examples on page 34 to gain a better understanding of the concept. Then we did the questions on page 35 and went over them in class.
• Nearing the end of class, Ms. K told us that there was more information on page 16 and 17 about the graphs.
• Also we were told to do paged 13 and 14 (we corrected up to question 5)

If anyone forgot to pick up a Grade 11 Physics Formula Sheet, do so tomorrow.
Jenna will be the next scribe (:
Happy Valentines Day! <3

Average Speed, Average Velocity and Modes of representation

Hi, it is my first day of scribing in this class.. the class started with some sort of review with past lesson.. the Vectors and Scalars.. for the lesson for today we took up the average speed and average velocity which can be found in pages 6 and 7 of the booklet given to us.. after that we were given time to answer the questions on page 20.. moving on, we discussed the differences of the 4 modes of representation.. We were given a hand in assignment that will be given on Monday.. Have a great week ends.. :)

Transparency, Visual Mode, Numerical Mode, Graphical Mode, Symbolic Mode

The class started with reviewing what we learned about scalars and vectors from the previous day. Then we started talking about average speed and average velocity on page six of our kinematics booklet, then we did examples on page 19 to 22 that were related to the readings. Once we finished going over the examples we started discussing different modes of representation found on pages 8 - 11. They were visual, numerical, graphical and symbolic modes respectively. We were then given a worksheet titled "Appendix 3.6: Describing Motion in Various Ways" that will be handed in on Monday for marks. Then the bell rang. Be safe and have fun and remember to complete the worksheet for marks! Oh and the next scribe will be Ms K. I mean davidhuynh

Unit Conversion Corrections, Kinematics, Scalars and Time

We started off the class by correcting the Unit Conversion questions . We later received a new yellow booklet with the title of Kinematics. We were given examples of vectors and scalars on the first page and were later asked to do pages four to five. We later corrected those two pages as a group and were assigned pages 36-38 as homework, which is a cross-word and a wordsearch.

Scientific Notation, Significant Digits, and Unit Conversion

Hi everybody. I am scribing for Wednesday class. At the beginning of the lesson, we corrected the homework on scientific notation and significant digits. Later on, we talk about the unit conversion and Ms. K assigned the two pages worksheet in the booklet which is due tomorrow. Also a reminder for those people who haven't hand in their advertisement assignment must hand in tomorrow.

Scribe List

This is The Scribe List. Every possible scribe in our class is listed here. This list will be updated every day. If you see someone's name crossed off on this list then you CANNOT choose them as the scribe for the next class.

jbd(2) PAR Jennaamanda VaNiLLa_iScream ahmed rage dud

josephine817 mohamed bobthebuilder chocnut Megatron

Jaksen Meryll Food(2) Anonymous

This post can be quickly accessed from the [Links] list over there on the right hand sidebar. Check here before you choose a scribe for tomorrow's class when it is your turn to do so.

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