Watch the videos found below, and then go to the link here Please draw force diagrams for Problems 1-15 on a sheet of paper (you DO NOT need to solve the diagrams, just draw them). You can probably just make copies of the web page, but there are lots of helpful hints up at the top. Hand in what you have done at the end of the hour.
Wednesday, November 5, 2008
Tuesday, November 4, 2008
Hooke's Law simulation
I have the flu :-( Justin and Ian, tomorrow you need to test your bridge, ok?
===
We are now moving from vectors and static forces (which don't move, or move at a constant velocity) to unbalanced forces (which have a lot more math, so you are going to need a calculator).
Today, you will study Hooke's law, which talked about movement of objects using potential and kinetic energy.
You can find the online simulation here
When you are finished, EACH person needs to post and individual paragraph in the comments section of the blog. Tell me about the difference between the forces and vectors that lead to kinetic energy, potential spring energy and potential gravitational energy.
Test is THURSDAY.
Congratualations to the football gentlemen for a TREMENDOUS EFFORT last night and good luck to the volleyball team tonight!
===
We are now moving from vectors and static forces (which don't move, or move at a constant velocity) to unbalanced forces (which have a lot more math, so you are going to need a calculator).
Today, you will study Hooke's law, which talked about movement of objects using potential and kinetic energy.
You can find the online simulation here
When you are finished, EACH person needs to post and individual paragraph in the comments section of the blog. Tell me about the difference between the forces and vectors that lead to kinetic energy, potential spring energy and potential gravitational energy.
Test is THURSDAY.
Congratualations to the football gentlemen for a TREMENDOUS EFFORT last night and good luck to the volleyball team tonight!
Monday, October 27, 2008
Building Bridges, Part 2 (a study in vectors and forces)
Today you need to build a type of truss bridge with a deck elevation of 20 meters. The group must maximize the effectiveness of the bridge while minimizing costs. You must create a new bridge, not simply rework an existing design.
Points
Less than 260000 dollars (+5)
Tension forces less than 3000 kN (+10)
Print the Test Results report and the Bridge design and hand in.
Based on this data, you will build (tomorrow) a bridge of toothpicks, straws, gumdrops, and manila folders (concrete). You must provide a scaled drawing of your bridge (1 m = 1 cm) BEFORE starting this project.
Points
Less than 260000 dollars (+5)
Tension forces less than 3000 kN (+10)
Print the Test Results report and the Bridge design and hand in.
Based on this data, you will build (tomorrow) a bridge of toothpicks, straws, gumdrops, and manila folders (concrete). You must provide a scaled drawing of your bridge (1 m = 1 cm) BEFORE starting this project.
Building a Bridge
(Download to drive D:\, if possible) and install.
Your goal is to build a bridge that can stand up to the test of time. Today, you will have about 1/2 hour to the basics of bridge-building...
Remember,
TRIANGLES are the best shape for building
DIFFERENT MATERIALS have different strengths
NET FORCE must be close to zero, or be balanced by material strength, or the bridge will collapse...
Your goal is to build a bridge that can stand up to the test of time. Today, you will have about 1/2 hour to the basics of bridge-building...
Remember,
TRIANGLES are the best shape for building
DIFFERENT MATERIALS have different strengths
NET FORCE must be close to zero, or be balanced by material strength, or the bridge will collapse...
Sunday, October 12, 2008
Vector Golf
For the purpose of this activity, cost is no object, so trees and sand traps can be added at will.
Draw a detailed sketch of your course using the paper by the meter stick and hand in. Make sure you have added a compass rose and have marked the scale on your paper. Color the course using colored pencils or crayons.
Provide a vector length and heading for the first leg of each hole.
Hints: Club houses are often 6000-15000 sq. ft. Houses are often 1800-4000 sq. ft., with the upper range representing a mansion-style home.
Hint: Google 'golf course design' if you need a sample to get ideas.
Step 2:
Each designed will make a scale drawing of one hole, using a scale of 3 cm = 120 yards. The scale drawing will be done digitally using Power, but three copies of the hole must be handed in. Label the drawing with a hole number, mark the tee with a T, and the hole in a flag. Make sure the compass rose on this drawing matches the orientation of the hole on the master course. The master course must also be handed in.
Monday, September 29, 2008
Gcast.com
GO to gcast and get an account. Create a podcast for me that explains the following:
Based upon your analysis of the cartoon, and the three situations, do you believe the values supported by the Cartoon physics mirror those found in real life for
a) constant motion
b) constant horizontal acceleration
c) constant vertical acceleration?
For each, explain why or why not. Think of the cartoonist's knowledge of science, the time of the week, the tools, etc.
I will be logging on to your gcast page to hear your explanation tonight.
Hand in your d-t, v-t, and a-t graph for each page. Place your movie file on the desktop of each computer before leaving tonight.
Thanks!
Wednesday, September 24, 2008
Friday, September 19, 2008
Thursday, September 18, 2008
Eek! The test was all over
Time for a reality check. Please go here and take the three formative quizzes. This means I am checking for your understanding, not giving a pop quiz. Your username and login were handed out in class.
Thanks!
Thanks!
Tuesday, September 2, 2008
Supercolliders
Those giant machines that smash protons and neutrons and electrons and antimatter mean something to the world of physics! They also develop side applications of technology (like the Internet) that we use daily. You took a look at this on your poster on Friday.
Now that you have done that, please answer the following in a 2-3 paragraph blog post...worth 15 points.
a) Do you think the benefits are worth the costs? Why or why not?
b) How does the work at the supercolliders tie into our understanding of radioactivity, or the weak forces of the nucleus?
c) When quarks and antimatter are generated, why do you suppose it is the strong force at work?
Now that you have done that, please answer the following in a 2-3 paragraph blog post...worth 15 points.
a) Do you think the benefits are worth the costs? Why or why not?
b) How does the work at the supercolliders tie into our understanding of radioactivity, or the weak forces of the nucleus?
c) When quarks and antimatter are generated, why do you suppose it is the strong force at work?
Friday, August 29, 2008
Wednesday, August 27, 2008
Your life and high energy physics
Today, you were asked to work on the self-paced notes from Particleadventure.org Now that you have done that, I want you to reflect for a moment on the world you live in. How does research like this impact your daily life? Is it the research that is important, or the tools they discover along the way to help do that job? Explain your answer in 1-2 paragraphs in the comments section.
Tuesday, August 26, 2008
Why Does All This Matter?
Science study of radioactivity extends to biology, medicine, and the universe being created. It's amazing what we are finding out, but even more questions remain unanswered about those little particles inside the nucleus.
What are you thinking about now?
Monday, August 25, 2008
Diggin up Uranium
Are the following useful or non-useful ways to use radioactivity? Why do you think so?
- irradiating food like spinach
- PETscans
- smoke detectors
- nuclear power plants
- studying the origin of the universe
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