Answers to 5+6 Review

1.  35 J
2.  4820 J
3.  a) 18.4 J  b) -10.2 J  c)  8.2 J
4.  3700 J
5.  -54 m/s
6.  980 W
7.  36 m/s west
8.  2.6 kg m/s
9.  -390 N, 0.13 m
10.  -0.60 m/s
11.  10. m/s
12.  4.5 m/s, 8.0 kg

Egg Drop

On Thursday 12/16 we will be dropping our Egg Drop contraptions off of the rear of the Lincoln stadium.  We will have time on Tuesday to work on the contraptions as well as about 40 minutes on Thursday.  You can do this by yourself or with one other person.

The categories are:
1)  Open category:  almost anything goes, but try to make it interesting.  Do not use any substances that will explode or make a mess upon impact.  The dropper will be responsible for cleaning up any messes.

2)  Limited materials.  I will provide clear drinking straws, masking tape, string, rubber bands, and paper.  Quantities used should be within reason.   Parachutes are banned from this category.

The Write Up:
1)  Labeled diagram of your contraption including metric measurements and materials used.
2)  Discuss 3 of the physics principles that are involved in the egg drop.
3)  After dropping:  How did it go?  If the egg broke, what would you do to try to improve the design?  If the egg didn't break, what would you do to challenge yourself further? 

Turn the write up in by Friday 12/17.

The Week of 12/13-12/17

• Monday 12/13:  Check off HW p. 211 1-4 and go over.  Conservation of Momentum.  HW p. 219 1-3.  Determine Egg Drop Rules.
• Tuesday 12/14:  Check off p. 219 1-3 and go over.  Hand out 5+6 Review Sheet.  Start building Egg Drop contraptions.  Egg Drop Rules will be posted Monday 12/13.  Final Draft of Spring Lab due tomorrow with Color-Marked version.
• Thursday 12/16:  Turn in Final Draft of Spring Lab and Color-Marked version.  Build Egg Drop Contraptions and Drop from the Stadium bleachers!!  Turn in Egg Drop Design.  Go over 5+6 Review.
• Friday 12/17:  Turn in 5+6 Review.  Short 5+6 Test.  Write down plan for Physics in Motion Project.

Have a Fantastic Winter Break!!  Remember that the Physics in Motion Project is due Thursday, January 20th.

The Week of 12/6-12/10

Reminder, there is a late-opening this week on Wednesday, so there is no FLEX on Wednesday.  I will still be available Tuesday during lunch.

Monday 12/6:  Bring in your completed line graph from Friday's lab.  Discuss graph and transforming data for inquiry lab.  Discuss conclusion for inquiry lab.  2nd Draft of Spring Inquiry due Friday.  We will do peer editing on that day.  Conservation of Mechanical Energy.  HW p. 182 1-5.
Tuesday 12/7:  Check off HW and go over.  Work-Kinetic Energy Theorem and Power.  Hand-out Work and Power worksheet, due Friday.
Thursday 12/9:  Introduce "Physics in Motion Project".  Library research.   Finish Work and Power worksheet and/or work on Spring Inquiry Lab.  2nd Draft of Spring Inquiry due tomorrow.
Friday 12/10:  Turn in Work and Power worksheet.  Exchange Spring Inquiry labs and do "color marking" (peer editing).  Give feedback to lab writer.  Introduce momentum and impulse.  HW p. 211 1-4.

Final Draft of Spring Inquiry will be due next Thursday 12/16.

The Week of 11/29-12/3 (updated on 12/1)

Congratulations Physics Students.  You have made it through the toughest part of the course!  Traditionally Chapters 3 and 4 are the chapters that give students the most confusion.  But things are just getting going.  Before Winter Break we will do a Full Inquiry Lab, start a project, and do an Egg Drop.  We will definitely be busy!
Here's the week coming up:

• Monday 11/29:  Physics definition of work and kinetic energy.  HW#11 p. 170 1+3, p. 173 1-3 (4 EC).
• Tuesday 11/30:  Check off HW #11 and go over.  Potential energy (elastic and gravitational).  HW #12 p. 177 1-4.  
• Wednesday 12/1:  Mid-day FLEX!  Come in for test corrections, help, or other makeup.
• Thursday 12/2:  Check off HW #12 and go over.  Conservation of Mechanical Energy.  HW#13 p. 182 1-5.   Hooke's Law data taking and Spring Inquiry Introduction. Write up Question, Background, Hypothesis, Variables, Procedure, and Data Table.
• Friday 12/3:  Take Data for Spring Inquiry Lab.  Check off HW #13.  

A Note About Conferences and Grades (Parents Please Read!)

Greetings!  I look forward to meeting many of you at Parent-Teacher Conferences next week.  One thing I want you to know is that I will be at all sessions EXCEPT the morning session on Tuesday.  I think the school reported that .80 time teachers would be absent on the Monday AM session, but I had already made appointments for my own childrens' conferences for Tuesday morning.  So any time but Tuesday morning please come in!

I have been entering grades for 2nd quarter, but be careful when you look at 2nd quarter grades because they only reflect the last 2 weeks of class.  If you want to know your student's accurate SEMESTER grade (the one that counts), please make sure that you are looking at the semester grade report.  Previously I had tinkered with adjusting this by adding a bunch of points to the 2nd quarter grade, but I just undid this because the semester grade calculations were coming out wrong.  If you have any questions, please don't hesitate to e-mail me at mkenny@pps.k12.or.us

Thanks!

Chapter 4 Review

In looking at the Chapter 4 Review, there are 2 problems that you may want to skip and come back to later.  They are #4 and #7.  I apologize that #7 is not very well written.  It should say that a "car is traveling at 50.0 km/h on a flat highway on a rainy day when the driver puts on the brakes."

Here are all of the answers.  We will go over them on Thursday.

1.  430 N
2.  49 N
3.  250 N
4.  0.331
5.  a)  0.883 N    b)  14.0 N
6.   51 N
7.  a)  -.981 m/s2     b)  98.2 m    c)  16.4 m
8.  4990 N
9.  - 1.48 m/s2

The Week of 11/15-11/19

• Monday 11/15:  Check off HW p. 145 1+2 and go over.  More on friction problems.  HW p. 147 1,2,4 (3 is extra credit).  Dynamics Cart Lab due tomorrow.
• Tuesday 11/16:  Turn in Dynamics Cart Lab (see documents for instructions).  Perform Slipping and Sliding Lab.  Check off HW and go over.
• Thursday 11/18:  Chapter 4 Review Sheet.  Review Newton's Laws.
• Friday 11/19:   Turn in Chapter 4 Review.  Take short Chapter 4 Test.

The Week of 11/8-11/12

Remember that even Block Day is Tuesday this week and odd Block Day is Wednesday.  Mid-day FLEX is on Tuesday!

Monday 11/8:  Chapter 3 Tests back and recollect.  More on forces:  balanced forces, free body diagrams, and Newton's 1st Law.  HW p. 133 1+3.
Wednesday 11/10:  Check off HW and go over.  Newton's 2nd and 3rd Laws.  Newton's Laws Lab.  HW p. 138 2-5.
Thursday 11/11:  Veteran's Day.  No School.
Friday 11/12:  Check off p. 138 HW and go over.  Normal force and friction.  HW p. 145 1+2

The Week of 11/1-11/5

Late work/Extra credit deadline for 1st quarter is Wednesday 11/3 by 12:30 pm!!

Monday 11/1:  Turn in Rocket Lab if not already.  Check off HW #7 p. 109 1-4 and go over.  Work on Chapter 3 Review Sheet.  Chapter 3 Test on Thursday 11/4.
Tuesday 11/2:  More on Review Sheet (turn in Thursday before test).  Start Forces:  types of forces, free-body diagrams, balanced forces.
Thursday 11/4:  Turn in Chapter 3 Review.  Take Chapter 3 test.   More on Forces.
Friday 11/5:  No School.  Teacher work day.  Enjoy your time off!

Rocket Lab

 Your Lab Should Have:

1)  A neat data table

2.2)  Calculation of initial velocity for each angle

    (show work for 1 example)

3.3)  Calculate how long the rocket was in the air for longest and       shortest

4.4)  Calculate the height of the rocket for highest and lowest

5.Extra Credit:  Graph launch angle versus range on LoggerPro

And the Data (thanks to Grace and the rocket runners)

Angle              Distance in yards

15                           66, 60

25                           84, 87

35                           100, 92

40                            108, 95

45                            89

The Week of 10/25-10/29

• Monday 10/25:  More on Projectiles launched at an angle.  Continue working on projectile worksheet (due Thursday).
• Tuesday 10/26:  Classic physics problem:  monkey in a tree.  Video example.  Derive the Range Equation.  Finish projectile problems.
• Thursday 10/28:  Turn in Projectile Worksheet.  Rocket Lab.  Extra Credit:  Make a graph of angle versus range using LoggerPro.  Data table, calculations, and graphs due Monday 11/1.  Relative motion.  HW#7, p 109 1-4.
• Friday 10/29:  Snicker's Lab:  brick or treat.  Can your group get the horizontally launched steel ball in the cup?  Check off HW #7 and go over.  Hand out Chapter 3 Review (test next Thursday).

The Week of 10/18-10/22 and Vector Addition Answers

• Monday 10/18:  Navigation Activity with Flight Maps.  Vector Addition Worksheet due tomorrow.
• Tuesday 10/19:  Turn in Vector Addition worksheet.  Explain Navigation Activity Part II.  Start simple projectiles.
• Thursday 10/21:  Quick Projectiles Lab with quarters.  HW #6 p. 102 1-4
• Friday 10/22:  Turn in Quick Projectiles Lab and Navigation Activity.  Check off HW #6 and go over.  Extra Credit hand-out.  Projectiles launched at an angle.  Homework:  First side of projectile worksheet

Answers for the Vector Addition Worksheet:
1.  11.7 km at 31 degrees W of N
2.  31.0 km/h at 15 degrees E of S
3.  412 N at 14 degrees north of down
4.  x=9.06 m/s  y = 4.23 m/s
5.  x= 35.1 m, y=71.9 m
6.  x = 86.9 m, y=-23.2 m
7.  x = 0, y=5 m
8.  9.0 km t 19 degrees S of W
9.  563 km/h at 1.64 degrees S of W
10.  16.6 km at 61 degrees
11.  8.9 m/s at -63 degrees or 297 degrees
12.  35 N at -1.7 degrees or 358.3 degrees

Note that your answers may be slightly different due to rounding and you may have found a different angle.  Check to see if your angle is within 90, 180, or 270 degrees of mine.

Progress Reports (To Parents and Students)

In the next day or two you should be receiving your progress reports in the mail.  Because the district is piloting a new grading program, the progress reports from me will probably be in a different form.  For one thing, every student will be receiving one from me, even if they are doing well in the class.  I also included no comments at this time because I am not up to speed with that yet.  If you would like updated information from me about missing assignments, please e-mail me.  Hopefully in the next couple of weeks, the on-line grade check will be available and you will have more information about your student's progress.

Reaction Time Lab Instructions and Chapter 2 Review Answers

Reaction Time Lab. 

Measure your reaction time without a timer!

1. Make a prediction of your reaction time
2. Write your procedure (drawing helps)
3. Take data (neat, labeled data table).  At least 10 trials per person
4. Calculate average reaction time (show work)
5. Calculate the uncertainty of the reaction time (high-low divided by 2)
6. Turn in!  (due by Tuesday)

Answers to Chapter 2 Review.  e-mail me if you have any questions!

1.  0.080 km

2.  70. km/hr

3.  111 m

4.   0

5.  89.3 m

6.  -15.2 m/s (or simply 15.2 m/s since I said "speed")

7.  60.1 m

8. and 9. to be discussed in class

The Week of 10/11-10/15

• Monday 10/11:  Go over review problems.  Prepare for chapter 2 test.
• Tuesday 10/12:  Turn in Reaction Time Lab if not already.  Turn in Chapter 2 Review and take Chapter 2 test.  Start on vectors.
• Wednesday 10/13:  Simple vectors and the Pythagorean Theorem.  (Short classes today!)
• Thursday 10/14:   Block Day. Adding vectors that are not perpendicular.  Navigation maps and adding vectors.
• Friday 10/15:  Even Block.  No class for you.

The Week of 10/4-10/8

• Monday 10/4:  20 minutes to finish homework from last week (p. 58 1-5).  Free Fall and calculations with free fall.  HW #5 p. 64 1-4, 5+6 are challenge problems.
• Tuesday 10/5:  Check off HW #5 and go over.  Graphing and free fall.  Motion detectors and free fall.  Hand out Chapter 2 Review.
• Thursday 10/7:  Reaction Time Lab.  Time Dilation and relativity.  Work on Chapter 2 Review.  Chapter 2 test next Tuesday 10/12.
• Friday 10/8:  Statewide Inservice Day.  No School!

Heads up for next week.  There will no Late Opening next Wednesday, October 13 because Lincoln will be engaged in school-wide testing (see school website for details).  In addition, Block Days will be on.... Thursday (odd block) and Friday (even block)

The Week of 9/27-10/1 (with revised homework schedule)

• Monday 9/27:  Questions on LoggerPro?  Try downloading it from Ms. Wadkin's site if you haven't already.  Calculating average velocity and average acceleration.  HW#1 p. 44 1-5.  Work time.
• Tuesday 9/28:  Check off HW#1.  Acceleration.  HW #2 p. 49 1-5   LoggerPro graphs, data table, and discussion of cart lab due Thursday.  FLEX during lunch today.
• Wednesday 9/29:  Mid-day FLEX today.
• Thursday 9/30:  Turn in cart lab (data table, graphs, and discussion).  Check off HW #2.  Motion with Constant acceleration.  HW #3 p. 53 1-3 and p. 55 1-3.  Motion Detector Lab. 
• Friday 10/1:  Turn in Motion Detector Lab.  Check off HW #3.  Final Velocity after any displacement.  HW #4 p. 58 1-5.  Start Free-fall?

The Week of 9/20-9/24

Remember that there is a 2-hour late opening this week on Wednesday!

• Monday 9/24:  Check off Chapter 1 Worksheet and go over.  Questions on graphing?  Turn in graphs.  Short Chapter 1 test on significant figures, metric system, conversions, scientific notation, uncertainty and measuring tomorrow.
• Tuesday 9/25:  Short Chapter 1 Test.  Start chapter 2 on motion.
• Thursday 9/27:  Run trials for "Cart Lab".  Take your tapes and process the data.  Introduce the LoggerPro program for graphing.
• Friday 9/28:  Make 2-3 graphs using LoggerPro.

The Week of 9/13-9/17 (updated on 9/15)

• Monday 9/13:  Counting and calculating with significant figures.  Calculating with uncertainty.  Hand out practice worksheet.   Do more trials for measurement lab.  Practice worksheet due Monday.  Final data table for Measurement Lab due Friday.  Signed Safety Contract due tomorrow.
• Tuesday 9/14:   Turn in Safety Contract.  Uncertainty with multiplication and division.  Time to work on worksheet and measurement lab.
• Thursday 9/16:   Scientific notation, metric system, and conversions.  Continue working on worksheet.  Components of a good graph, including uncertainty.   Practice graphing 2 different sets of data on graph paper and turn in today during class.   Introduce LoggerPro.  Go to Ms. Wadkin's website to download "LoggerPro" for use at home.   Please download if possible by next Tuesday.
• Friday 9/17:  Turn in Measurement Lab data.  More on graphing and LoggerPro.  Any questions on significant figures, uncertainty, conversions, or scientific notation?  Worksheet due Monday.  Short test on this material on Tuesday. 

The Week of 9/7-9/10

• Tuesday 9/7:  First day of School!  Introductions.  Demonstrate Early Work.  Fill out Student Information Sheet.  Hand out Classroom Expectations.  HW:  Read Expectations and bring in questions Wednesday.
• Wednesday 9/8:  Questions on Classroom Expectations?  Hand out Safety Contract. Due back signed by yourself and a parent by Tuesday 9/14.  What is Physics? How do we do it? Begin Measurement Lab.
• Thursday 9/9:  Discuss uncertainty and continue with Measurement Lab.  Include uncertainty in your measurements.
• Friday 9/10:  Significant Figures, how to count them and compute with them.  Add significant figures to your measurements.

Hold on to your measurement lab for now.  We have a few more things to talk about before it will finally be due next Thursday.

Welcome to the 2010-2011 School Year!

Greetings new students! This website will be very important in keeping you updated and informed about this class. If you are absent or have any questions about what is going on in class, please check here! Most of the class documents will be available here and I will include links that we used in class or that I just think are really cool. Please feel free to comment here, although I prefer if you include some identifying information, like "Hannah from 5th period" or "HB from 5th". You can also e-mail me and I will get back to you as soon as I can (if you go to the 'view my complete profile' tab under 'About Me', you will find a link to my e-mail).

Frequently students find links and resources that they think will be helpful to other students. If I agree, I will add the link and give a few points of extra credit to the student. Many of my best resources and suggestions have come from students.

I'm looking forward to having an incredible year of learning Physics with all of you!

Welcome!

This is where assignments and news for Ms. Kenny's physics class will be posted.   More to be posted over the week-end.