Projects 02 - RHR, Trebuchet, Magnets-in-pipes |
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OPENING QUESTIONS: Let's try a *gentle* competition.... First group to get these done correctly gets a prize! (4i + 3j - 2k) x (-i - 3j + k) . . ═══════════════════════════ Now find the MAGNITUDE of the resulting vector ═══════════════════════════ .
═══════════════════════════ Now find the MAGNITUDE of the resulting vector (OUCH!) Add up the i's first: -
3i + -6i = -3i
Add up the j's next: -
-4j + 2j = -2j
Now add up them thar k's -
3k - 12k = -9k
sooooooooooooooooooo our vector is: -3i + -2j - 9k And just like in planar (2x) geometry we calculate the magnitude of the resulting vector by squaring everything, adding 'em up and rooting the result: (-3 (94) = 9.70 or 9 if we were tracking siggie figgies Comming before the end of the year: - A quick rhr quizzypoo like today's opening question (please make sure to give me your old test if I don't have it). A chance to gain back up to 4 points on your induction test
. - The First Annual GHHS Cross Product Challenge:
WORK O' THE DAY: I know we want to do a professionally appropriate challenge to Johnson's classes, but I also wanted to make sure that we didn't have TOO much of a head start on them... . So... here's the information that we'll want to *OFFICIALLY* transmit to the JV today: - The challenge will take place on the turf field on either the senior's last day or their 2nd to the last day
- The 'body' of the trebuchet must be 4' x 4' x 4' or less
- The lever arm can be any length and any material
- The counterweight can be any material and any mass
- The projectile will be a regulation fast-pitch ball
- Total cost of materials MUST NOT EXCEED $30 (
*reasonable*material from home is acceptable)
Mr J and I are working to schedule a "Field Trip" for that day during 2nd/3rd/4th periods... TBD . Work o' the day: The final *other* project we have for the duration is to design and carry out SOME sort of investigation involving neodymium magnets falling through pipes... I purchased a number of 1/2" x 1/2" neodymium magnets to facilitate your work...please be GENTLE with them Let's go with true inquiry on this one folks... pick some aspect of a magnet moving through a pipe and work to investigate that scientifically. You will have:
Take a few moments to work on determining your investigative question to guide your lab. This lab will be written up using our basic Baylor lab guidelines and is due . |
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