in class with chris d’amato

Journal assignment 11/21

Make a new post on your blog titled “Journal entry 11/21″ and address the following questions.

1. In your own words, what is the difference between motion with constant velocity and motion with constant acceleration? Give a real-world example of each type of motion.

2. Is it possible for an object to move with both constant velocity AND constant acceleration at the same time? Explain how you know.

3. Consider the following graph of velocity vs clock reading. Which car has a greater change in position during the time interval shown? Explain how you know.

4. Describe the motion of car C in the graph below

Posted in Assignment, Period 1, Period 3, Period 7, Period 9 | Comments

World of Goo

Finished your homework? Bored of being outside and getting healthy exercise, interacting with other human beings?

Might as well check out this game demo. I thought the first three levels were awesome.

But I gotta get back to grading and then install a bathtub, so I will probably never see the rest of it.

Posted in | Comments

Help for journal 11/14 questions 3 and 4

3. What is the meaning of the slope of the line on this graph? Discuss the physical meaning of the slope of the line and make up a name for this quantity.

What does the slope mean in the real world?

Hints: Consider what the slope of a line on a graph of position vs clock reading means. Consider the units of the slope of your v(t) line.

Make up a name that is descriptive of the physical meaning of this quantity. Unless you know the “official” name.

4. Discuss how the equation in question 2 above would change if the ball were slowing down instead of speeding up. Discuss how the equation would change if you the ball were initially thrown upwards.

After doing all the work above, this question should be manageable. If it’s still not, review your answers to the previous questions and check your understanding.

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

Help for journal 11/14 question 2

Use the table from “e)” to plot a graph of average velocity vs average clock reading. You don’t need to include the graph in your blog post unless you want to, but you need to make the graph.

2. Write a function for how the speed changes with clock reading, v(t). This is the same as asking you to write an equation for the line on the v vs t graph you just made.

Make a graph using the table from question 1. Plot average velocity on the vertical (dependent) axis and average clock reading on the horizontal (independent) axis.

Draw lines up and down from your data points to indicate the estimated uncertainty in your calculation of average velocity.

The points you plot should be close to forming a straight line. Draw a straight trend line which comes as close as possible to all the points. It does not need to go through all the points.

Find the equation of this line. You can use the slope-intercept method which is just like y=mx+b but using v and t instead. 

To impress me even more: show the units of both the physical quantities in the equation. This will also help with the next questions.

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

Help for journal 11/14 question 1

1. What pattern(s) do you see in the table you created in question “e)”? How does this pattern relate to the motion you described in your response to question “a)”?

First column: This table analyzes motion for a series of time intervals. Most people will analyze the motion using time intervals of equal size.

Second column: The displacement is the change in position during each time interval. When you have filled in this column, you should see a pattern that is consistant with an object that is moving with increasing speed. If you do not, check your measurements or your calculations.

Third column: “Average clock reading” means the clock reading that occurs in the middle of the time interval. For example, consider a 10 minute time interval that starts at 1:30pm. The average clock reading over this interval is 1:35.

Fourth column: Average velocity for any time interval is equal to the displacement of the object divided by the travel time interval.

Patterns in the table: describe how patterns in the numbers are consistant with the motion of this falling ball.

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

Journal assignment 11/14

Complete the activites in lesson 10 in your activity guide, questions “a)” through “e).” You can take measurements on the attached document, if necessary.

Then answer the following questions in a blog post titled “Journal assignment 11/14″

1. What pattern(s) do you see in the table you created in question “e)”? How does this pattern relate to the motion you described in your response to question “a)”?

Use the table from “e)” to plot a graph of average velocity vs average clock reading. You don’t need to include the graph in your blog post unless you want to, but you need to make the graph.

2. Write a function for how the speed changes with clock reading, v(t). This is the same as asking you to write an equation for the line on the v vs t graph you just made.

3. What is the meaning of the slope of the line on this graph? Discuss the physical meaning of the slope of the line and make up a name for this quantity.

4. Discuss how the equation in question 2 above would change if the ball were slowing down instead of speeding up. Discuss how the equation would change if you the ball were initially thrown upwards.

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

Running is hard

My best is 1.3 meters… how about you?

http://www.foddy.net/Athletics.html

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

MP1 Quarterly exam results

As of the time of posting I have evaluated all the points recovery applications I have received.

213 Points recovery applications were accepted

52 Points recovery applications were not accepted

The average student got a +22% increase in multiple choice grade!

You may submit additional points recovery applications until the marking period deadline on Friday 14 November. They will be evaluated in the order they are received, subject to the time I have available.

You will need your student code to see your results on the following pages:

Multiple choice results with points recovery status

Free response results with points recovery status

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

Rubrics for evaluating journal 10/31

These rubrics apply to the “Journal entry 10/31″ assignment which is based on the lab from lesson 7 of the kinematics activity guide.

You can use these rubrics to find out how I evaluated your response, and how to improve your work if necessary.

The total score of your journal entry is determined by the number of Acceptable answers according to the rubric below. This means that you could earn 6/4 points (EXTRA CREDIT!)

Students who start on time and attempt to address the assignment will earn a minimum grade of 2/4. Late submitters will earn a minimum of 1/4 point but can still earn full credit or even extra credit with Acceptable responses.

This assignment will be closed on Thursday 11/6 and the final score will be completed.

Read the rest of this entry »

Posted in Period 1, Period 3, Period 7, Period 9 | Comments

Review materials for Monday’s exam

The exam on Monday covers lesson 1 through 7 in the Kinematics Activity Guide.

I would like to call your attention to the summary and review items found in the guide throughout pages 1 to 33.

You should also work through the attached review activities, preferably with a classmate.

If you have any questions about the material, or help to offer your classmates, try the Discussion link at the bottom of this post.

Posted in Period 1, Period 3, Period 7, Period 9 | Comments