Tuesday, January 28, 2014
Monday, January 27, 2014
1/27 Physics update and Homework due 2/3
Hi folks,
Today we talked about about human energy and how humans get and use energy in the form of calories.
We also did a bit of work with simple machines and did a lab using the lever.
Homework this week is to answer the questions in this email and
Read the Levers chapter in the Bite-Size Physics book I sent and do all 5 questions at the end of the chapter. Please use the answers as reference only! Answer them yourself first. :)
1. What happened to the effort force as the fulcrum got closer to the load?
2. What happened to the effort force as the fulcrum got farther from the load?
3. What happened to the load force as the fulcrum got closer to the load?
4. How about when the fulcrum got farther from the load?
5. If you wanted to lift an object that you couldn't lift by yourself, where would you put the fulcrum? Close to, or far from the load?
6. What relationship does distance have to force in regards to the lever?
Today we talked about about human energy and how humans get and use energy in the form of calories.
We also did a bit of work with simple machines and did a lab using the lever.
Homework this week is to answer the questions in this email and
Read the Levers chapter in the Bite-Size Physics book I sent and do all 5 questions at the end of the chapter. Please use the answers as reference only! Answer them yourself first. :)
1. What happened to the effort force as the fulcrum got closer to the load?
2. What happened to the effort force as the fulcrum got farther from the load?
3. What happened to the load force as the fulcrum got closer to the load?
4. How about when the fulcrum got farther from the load?
5. If you wanted to lift an object that you couldn't lift by yourself, where would you put the fulcrum? Close to, or far from the load?
6. What relationship does distance have to force in regards to the lever?
Tuesday, January 21, 2014
1/20 physics update and homework due 1/27
Hi folks,
Last week we did a nice conceptual overview of what energy is and this week we got a bit more into the nitty gritty and mathematics behind energy. We introduced the concept that energy is the ability to do work and that work is equal to force times distance. To make that more concrete, we went outside and pushed my car again. This time, however, we measured the amount of force it took to move the car and measured how much time it took to move it. Using those measurements we calculated the energy it took for us to move the car and we found how many Watts and how much horsepower we used.
In my opinion the text that we're using goes into too little detail on energy. I'm including my Energy eBook to help supplement the text
Homework for due 1/27 is to
Read pp 103 and 104
Read the Energy and Work chapter in the eBook
Do Review Questions on page 119 #'s 1 - 5
Plug and Chug Pg 120 #'s 1 and 3
Think and Solve # 2, 4
Also, do the "Find the Power" experiment in the eBook. We did the first part where you find your wattage in class. (Email me if you can't remember your wattage.) Compare yourself to at least 5 different appliances.
Monday, January 20, 2014
Recording for physics class week 18 Energy and Work
Your video's now on YouTube.
Physics 2013 week 18
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Wednesday, January 15, 2014
Link to Phet Sim for Physics homework
Hi folks,
Sorry, I forgot to include the link for the sim. Here you go. http://phet.colorado.edu/en/simulation/collision-lab
Sorry, I forgot to include the link for the sim. Here you go. http://phet.colorado.edu/en/simulation/collision-lab
Tuesday, January 14, 2014
1/13 Physics class and Homework Due 1/20
Hi folks,
We have started our energy block today. We discussed how we perceive energy using our energy "antennae", our ears, eyes and skin. We also discussed how energy is like a phantom. It's invisible until it interacts with matter, it changes forms and it can neither be created nor destroyed.
Homework for this week is to do the enclosed .pdf. This is another exercise with a PHET simulation. There still seems to be some confusion with conservation of momentum so this well help to nail down that concept. Besides….it's kinda fun! :)
We have started our energy block today. We discussed how we perceive energy using our energy "antennae", our ears, eyes and skin. We also discussed how energy is like a phantom. It's invisible until it interacts with matter, it changes forms and it can neither be created nor destroyed.
Homework for this week is to do the enclosed .pdf. This is another exercise with a PHET simulation. There still seems to be some confusion with conservation of momentum so this well help to nail down that concept. Besides….it's kinda fun! :)
Recording of Week 17 class: Introduction to Energy
Your video's now on YouTube.
SANY3239
Monday, January 6, 2014
Jan. 6 Physics update and homework due Jan. 13
Hi folks,
Today we wrapped up our unit on mechanics with a lab practicum. The students used all their new and fun formulas to analyze the game Angry Birds. They figured out the momentum, mass, force, impulse, acceleration, velocity and more of various aspects of the game. If you would like to get into this in even more depth a fellow by the name of Rhett Allain has done many many calculations on various parts of the game. Here is a link to a forum with bunches of articles by him.
Homework for this week is to:
Read Chapter 11 pgs. 150 - 164
Do the ODD Review Questions on page 165 #'s 1-19
Do Plug and Chug Questions #'s 1 and 2
10 points of extra credit if you do the first activity on page 166.
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