Projectiles, Part 2

Assuming that you can throw all objects at a speed of 3 m/s, what effect will a changing angle have on the distance a projectile travels?

What about a changing mass?

Projectile Motion

Everytime we launch something into the air, it has properties of a projectile. Today we will be studying the properties of projectiles here

When you get done, tell me what you have learned about

a) angle patterns

b) object shape patterns

c) object shape patterns with resistance

You may work with a partner, but the blog post must be done individually.

Explaining a Newton to someone (10 pts)

A common quarter pounder weighs about 200g, with bun, or about 2N. 10 N is about 2.2 pounds. Come up with a scale of common objects that are an example of

1 N (.1 kg)

10 N (1 kg)


100 N

1000 N

10000 N

Football isn't always Football

Ask a European what football is and you can get tons of answers! Just check here for a look.

Pick one type of football (rugby, soccer, American Football, Aussie Football) or some ancient version and give me an example of when you would find inertia, a mass vs. acceleration relationship, a mass vs. force relationship, and a force vs. acceleration relationship. Explain two different frames of reference from which you can watch the game.

Forces around us

What variables affect the strength of a force? Consider forces in balance and forces not in balance. Are they the same or different?

Happy Early Out!

Well, guys, tomorrow is the first test. You need to spend at least a half hour studying. The test will include 10-15 multiple choice, and 3-5 short answer. I do not ask for vocabulary word definitions (that matching section), but I do use the vocabulary in the questions to help you think.

Topics covered on the test include:
reaction time
stopping distance (double the speed, increase stopping time by 4)
yellow light factors
what a d-t graph looks like for constant speed, acceleration, deceleration, and no motion.
strobe photos
how to avoid road hazards
equipment conditions
the questions in these blog posts...


Have a great day!

BM 2 Final Reflection

Write a 2-3 paragraph summary of what you have learned in this project about driving safety, and the factors affecting individual drivers. This should be a separate comment on the blog for each student. It should show me, without defining a list of vocabulary words, that you know what it means for a car or a person to experience velocity, speed, acceleration, reaction time factors, centripetal force, inertia, and equipment condition.

Please hand in the graph from part 1, the poster from page 2 (if you did it), your conclusions from page 3, and your conclusions from page 4.

Breakdown of points

Blog post 1: 10 points (that's the one below this post)
Graph: 20 points (you have done this)
Page 2 or Blog Post: 10 points (you have done this with your poster)
Page 3: 10 points
Page 4: 25 points (you need to make sketches of each)
Final blog Post: 25 points (that is this one)

BM2 Reflection--DO THIS FIRST

Your first task is to put together a driving manual. You can get the directions from me. Before you start, answer the following in 6-10 sentences:

Why do you think drivers need to know the fundamentals of speed, velocity, and acceleration while they are driving? What is the most common reaction time distraction YOU are likely to have? Answer in the comments

Nascar Tracks and Grooves

If you watch pro racing, you see those cars getting into a groove or two, with racers either driving at the top or the bottom of the track. You also see banking.

Why do these two factors matter?

How do you go around a curve?

What is the safe way to go around a curve?

What does it mean to bank a curve?

Who controls what?

So, there's yellow light ahead. You have jackrabbit drivers, overly cautious drivers, tired drivers, and poor brakes. You have single roads, double lanes, and overpasses...

What things can engineers control as they design the intersection? What things can you control?






Activity Link

Mapquest

Factors involving Yellow lights (20 pt)

How does the two stop light system in downtown Manchester differ from the light bank found in a city, where six or seven yellow lights in a row can be found? Give me a concrete example (Dubuque, CR, etc.) and your belief about what factors can change.


Text your group hypothesis to me regarding the use of the final yellow light simulation found on the last blog post. You need to explore safety and stopping mechanism, or stopping mechanism and flow rate in some way.

Write your whiteboard up with a procedure and a data table.


Dilemma Zone

Those Yellow Lights

Why do we need yellow lights?

Why do we seem to hit several lights in a row as either being green or being red?

Should we speed through yellow lights?


http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=139.0



http://www-stat.stanford.edu/~susan/surprise/Car.html

http://www.phy.ntnu.edu.tw/oldjava/Others/trafficSimulation/applet.html

Blogsphere Land

Good morning! As you have probably guessed, I am not in the classroom today. I expect you to be doing a variety of things with your lab partners, including making a poster worth 20 points. The groups for today's poster are:

Group 1: Bryan, Ted, Tory
Group 2: Amie, Claire, Cari
Group 3: Tea, Summer, Jordan
Group 4: Dalton, Jennie, Kyle
Group 5: Ryan, Joe, Josh
Group 6: Erin, Lexi, Jon S.
Group 7: Tabitha
Group 8: Michael R

Assignment:
===============
1. The computer lab is not available today. Make due with the computers we have in the classroom, please. Go to here sometime during the day today and nominate a teacher that has made a difference in your life. It can be anyone in your life who has believed in your abilities and it is a chance for them to be recognized. Txt me when you are done with this step...just say, "This is _____--done."

2. You are traveling down a road and a deer runs out. Quick, what do you do? Click Here for a list of ideas (I have run several copies for the substitute, so please get one per group). Circle the three things that you think are most important.

Now, imagine you need to communicate this information to others in a VISUAL manner, with a maximum of ten words on the paper. Make a poster to explain how reaction time and equipment condition can help you to avoid the deer or minimize the collision. How would this be different if you were going around a curve at the time of the deer sighting? Hand this in before you leave today. Linsay and Jordan can help you find colored pencils or markers. After you do this, you may move back to your table

3. Read pp. 36 in your book and use the information to answer Q 1-8 on p. 40

4. Make a graph with speed on the x-axis and stopping distance on the y-axis for the picture at the top of this post(again, I have run several copies of this) and hand in with your name on it.



Thank you for being such a good sport! I really really appreciate it.

See you tomorrow.

Stopping Distance

As you double your speed from 20 mph to 40 mph, what do you think will happen to the distance you need to come to a complete stop? Estimate in terms of a number (E.G., 1.5 times, 3 times, etc.)

Give details of how you accelerate when:

a) you come to a stop sign
b) you go around a curve
c) you are coming onto an on-ramp for Hwy 20.