Last Week:
Mon– LABOR DAY
Tues– Slide Show, BoW, Discuss UA (1.4.5), HO 1.6
Wed– HO Take Home Test 1, Discuss 1.6, Circular World
Thur–HO 1.7 Go Outside, Discuss Circular World, Inspirational speech, Class Pic, Fight Song
Fri– Add covers to Notebooks, Discuss Bridge Equation between Circular World and Linear World, Work on 1.7 (graphing slope graphs)
Coming Week (Proposed)
Mon- BOW, Short Slide Show, JM, HO Packet 1 Organizer, Staple entire Packet together, TRIBE DAY
Tues– RED Day for Take Home Test 1
Wed– Wrap up Packet 1
Thur– HAND IN: 100pt Notebook, 100pt Packet 1. Take 200pt Test 1
Fri– Make Ups, Flash Back Friday, Start Packet 2, VB??
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3) Notice only one true given. The rest are all conversions (clever forms of one).
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- PhyFl14 Packet 1 (week 3) Remember that when you square the unit, you must square the number as well.
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- PhyFl14 Packet 1 (week 3): On the front page of the physics website, click on the 3 minute help video that shows you how to register for the forum. The cool thing about the forum is that you can use it to ask me or anyone else in the class questions.
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- PhyFl14 Packet 1 (week 3): The unit size needs to match the size of the number. It’s dumb to have a big unit that is not appropriate for a small number or vice a versa.
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- PhyFl14 Packet 1 (week 3): This graphic represents the process that should go on in your head when you are trying to find a better way to write a number. (choose the proper units)
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- PhyFl14 Packet 1 (week 3) . . .
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- PhyFl14 Packet 1 (week 3) . . .
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- PhyFl14 Packet 1 (week 3) Answers to 1.5 (21-25) There is also a key posted.
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- PhyFl14 Packet 1 (week 3): Answers fro 1.6 (1-6)
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3): We didn’t have a lot of time to go through this problem in class, but it is a classic physics problem. The key is to realize that the fly spends no time on the wheels and the two bikes will each travel for an hour before colliding . . . and . . . how fast was that fly flying?
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- PhyFl14 Packet 1 (week 3): This is crucial for your success in Physics.
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- PhyFl14 Packet 1 (week 3): We will be talking about circular world (and later the world of waves) throughout the year. This is tour introduction.
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- PhyFl14 Packet 1 (week 3): A radian is so simple a thing. Why don’t they teach it to you in 7th grade?
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3): Angular velocity (omega) is the measure of how fast something is spinning in terms of radians/second
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- PhyFl14 Packet 1 (week 3): Ever wonder why there are 2π radians in a circle? It’s pretty easy to figure out by the definition of a radian. The arc length (∆s) is just the circumference (2πr) for one complete revolution), divide that by the radius and you come out with 2π
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- THE WHEEL (and the BOSS). Ah yes, any day I get to spin the wheel is a good day!
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- PhyFl14 Packet 1 (week 3): We checked the angular velocity of the spinning wheel in front of the class. We spun the Boss around 5 times and timed it. It was moving 1.2π inverse seconds. W
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- PhyFl14 Packet 1 (week 3): We have to call the units of omega inverse seconds because radians don’t have any units (since a radian is a ration of meters over meters).
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- PhyFl14 Packet 1 (week 3) …
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- PhyFl14 Packet 1 (week 3): So π/30 is about a tenth of a radian per second. Pretty slow.
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- PhyFl14 Packet 1 (week 3): Minute hand and hour hand’s speeds.
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- PhyFl14 Packet 1 (week 3) . . .
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- PhyFl14 Packet 1 (week 3): We need to come up with a bridge equation that relates circular motion to linear motion.
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3) : Here is our first derivation of the year. Notice there are no numbers in this derivation. The further you go in math and science, the less numbers there are. Symbols are much better, they show general relationships rather than just some specific situation.
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- PhyFl14 Packet 1 (week 3): 1.6.10 Ant crawling on a basketball.
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- PhyFl14 Packet 1 (week 3)
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- PhyFl14 Packet 1 (week 3): Askey’s Trippin Run.
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- PhyFl14 Packet 1 (week 3): The symbol tau has various meanings in physics. Here is the first one we come across. When you are adding times, tau means the accumulated time. So this is a “t-tau table”.
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- PhyFl14 Packet 1 (week 3): The graphical results of my trippin run.
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- PhyFl14 Packet 1 (week 3): The E&M Fab Four did a marvelous job of helping 1st hour with graphing and analyzing their data.
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- PhyFl14 Packet 1 (week 3): The beginning of a slope graph.
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- PhyFl14 Packet 1 (week 3): Shows the x vs. t graph and then the beginning of the corresponding v vs. t graph.
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- PhyFl14 Packet 1 (week 3) . . .
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- PhyFl14 Packet 1 (week 3) The old baseball analogy. Displacement vs. distance.
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- PhyFl14 Packet 1 (week 3) . . .
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- PhyFl14 Packet 1 (week 3): I had a distance of 34 meters on my trippin run, but o a displacement of -4m because the displacement is a vector that only measures the beginning and end points. Path doesn’t matter.
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- PhyFl14 Packet 1 (week 3) . . .
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- PhyFl14 Packet 1 (week 3): Physics and math are foreign languages in many ways. These three words mean basically the same thing. I must qualify the Physics a bit. Slope equals velocity as long as you are graphing position vs. time.
Askey Physics 