If you were absent today:
In 2013: We went outside and collected the data for 'g on an egg' as tomorrow is supposed to be much colder.
If you missed today you can time your period to make up the 'g on an egg' from these videos.
2013 For all the remaining video's, I videotaped from indoors most of them as I wanted to open the nearest doors for each class as it was really really cold out. Colder tomorrow.
2013 Period 3 Ms. Wernicke's class doing the 1 m, 2 m, 3 m, and 4 m 'g on an egg.
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2013 Period 3 Mr. Hagstrom's showing how to learn from dying in laughter 1st hour where they tried spinning the 4 meter without extra mass in the can with the egg. I haven't laughed this hard since my children flew from the nest.
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2013 Period 4 being taped from the 2nd floor window doing 1 m, 2 m, 3 m, 4 m
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2013 Period 7 with Maddie 1 meter, Lauren 2 meters, Matt 3 meters and Erik 4 meters
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2013 8th Period showing how to spin the egg at 1 m, 2 m, 3 m, and 4 m.
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In 2012 I wrote: Bring your coat tomorrow as we will be outside for about 15 minutes.
Can you guess the 1st day of Physmas? Each day the first student to guess that day of Physmas after class starts that period gets a point of extra credit. We do one each school day until December 20th placing number 1 up tomorrow and guessing number 2 tomorrow.
We handed out the Objectives and Homework Sheet for Unit5 Circular and Harmonic Motion and assigned the first three problems by Wednesday...
And I swung the can (without the egg in it used for tomorrows quickie lab outside) with a radius of 1/2 meter and four students timed 10 revolutions. Then we filled out all the calculations for tomorrows lab...
1st period's results of the demonstration done above like tomorrows lab with calculations shown
I also went around the classroom showing all the cool new circular motion toys and puzzles to play with...
Can you guess the 1st day of Physmas? Each day the first student to guess that day of Physmas after class starts that period gets a point of extra credit. We do one each school day until December 20th placing number 1 up tomorrow and guessing number 2 tomorrow.
We handed out the Objectives and Homework Sheet for Unit5 Circular and Harmonic Motion and assigned the first three problems by Wednesday...
And I swung the can (without the egg in it used for tomorrows quickie lab outside) with a radius of 1/2 meter and four students timed 10 revolutions. Then we filled out all the calculations for tomorrows lab...
1st period's results of the demonstration done above like tomorrows lab with calculations shown
I also went around the classroom showing all the cool new circular motion toys and puzzles to play with...
The Big Picture
1. An object in circular motion at a constant tangential velocity (not swinging it faster or slower) has a centripetal acceleration due to the fact it is changing direction. Remember that velocity is a vector quantity meaning it has both magnitude and direction so if the magnitude stays the same the object can only accelerate if it is changing direction. Also, where can you find this concept in Newton's 1st and 2nd laws. Also, that of the train in New York that derailed Thanksgiving of 2013 and Paul Walker (Fast & Furious actor) who died when the Ferrari he was in did not make a curve and hit a tree (WHY did these accidents happen???)
2. To spin the object you need to pull in on the object this the force is inward (centripetal) and since F = ma the acceleration must be inward.
2. To spin the object you need to pull in on the object this the force is inward (centripetal) and since F = ma the acceleration must be inward.