12-1

The Physics Journalist Period 3 12-1-08 Elizabeth Young

Today was a pretty basic day in physics. We continued to apply all that we learned last week. We started out with the DQ: ** Daily Question      ** //(*answers will be at the end of TPJ*)// 
 * 1) Identify the action/ reaction pair for your weight.
 * 2) Which is larger? (from #1)
 * 3) How does a helicopter get its lifting force?

Then we had a discussion about Newtonian Pairs: F G =Earth Pulls on box F N =Table pushes on box F G = F G F N = F N F G =Box pulls on earth F N =Box pushes on table
 * FBD || Action/Reaction Drawing ||
 * [[image:webkit-fake-url://CA4031E2-4B46-4CE4-9AC9-57BCC18DB659/image.tiff]]
 * Balanced, but not a Newtonian pair || [[image:webkit-fake-url://E7C015C7-7491-4486-AFF9-3F50E7E3E195/image.tiff]]

||

After discussing the Newtonian Pairs, we worked on Newton's 3rd Law: pg. 6 and 7 which was given out at the beginning of the period. He gave us some tips: For #1, write the reaction. For #2, consider the horse and cart as one object. For #4, use (sigma)F=ma. We worked on this the entire period, and then he passed out pg. 8 to complete for homework. YEAH PHYSICS! __**REMINDERS**__ Buy a protractor and ruler (cm) by Wed. Test/ Reading Guide due Wed. Answers to DQ:
 * 1) Earth pulls on person; person pulls on earth
 * 2) They are equal
 * 3) Blades are pushing air down; air pushing up on blades

I don't know if you can see the diagrams I drew. I copy and pasted them, and everything was fine until I pushed the final save button. Then they appeared as boxed ? marks. I have them. I actually think I saved them under the "insert images and files" button. Actually, here's the link, just in case: [|Physics Journal 12-1.doc]
 * FYI Mr. Manning*

