Presentation on theme: "AP Mon 11/28 Papers back Go over chapter 8 day 2 AP Tues 11/29 Chapter 8 day 2 redos due. Do “Extra Problems” from other books AP Wed 11/30 “Extra Problems”"— Presentation transcript:
AP Mon 11/28 Papers back Go over chapter 8 day 2 AP Tues 11/29 Chapter 8 day 2 redos due. Do “Extra Problems” from other books AP Wed 11/30 “Extra Problems” from other books DUE STUDY! (don’t forget calculus!) AP Thurs & Fri 12/1-2 Two-day TEST HW: 4-part Experiment write-up!
AP Monday 12/5 1.Discuss Experiment write-ups Lecture notes on error analysis 2.Test corrections In red on test, 20 min or so 3.Rest of semester discussion (finals…) 4.Lecture Notes and Impulse-Momentum theorem See next 2 slides 5.Asst: D (easy J = F · t = p problems)
Note – this unit looks VERY similar to the last unit: In that unit you had 2 basics equations: (1) J = F t = p, or if the impulse was zero (as it is in a closed & isolated system), then: (2) p initial total = p final total See in later slides that, just like the impulse-momentum theorem above, we now have the work-energy theorem: (3) W = F d = E And see in later slides that, just like we had the conservation of momentum in a closed & isolated system above, we now have the conservation of energy when the net work done is zero: (4) E initial total = E final total So, you will have both of those types of math-problems to solve on the test, as well as many conceptual problems again. (But note things are slightly more complicated this time, as the F d, written & pronounced “F dot d” is a special type of multiplication, and there is more than one type of energy!)
J = F · t = p = p F – p I = mv F – mv I = m(v F – v I ) = m v a b c d e f g
AP Tues 12/6 1.Quick lecture notes on “conservation of momentum” See next 4 slides 2.Do the experiment (since the equipment is already out!) 3.Asst E (easy p = 0 problems)
Conservation of Momentum problems: 1.Write for EACH problem: (m 1 v 1I + m 2 v 2 I + …. = m 1 v 1F + m 2 v 2 F + …) 2.Plug in knowns/unknowns BEFORE collision for each object: 3.Plug in knowns/unknowns AFTER collision for each object 4.Solve for what you don’t know
Note the units must “MATCH”, like in the gas laws in Chemistry. So, the masses can be in grams, if they ALL are.
(m 1 v 1I + m 2 v 2 I + …. = m 1 v 1F + m 2 v 2 F + …) Some examples from non-AP:
Some more examples from non-AP:
1.Questions on HW (either D or E) turn in D Go over ch9#35 and ch 10#37 2.More W-E-P test corrections 3.Start doing / explanation of 2-D problems w/ vectors 4.Asst: G #1-4 (yeah, we’re skipping around a bit) AP Wed 12/7
1.Any more Questions on HW E; turn in 2.Go over 2-D w/vectors; “finish” #1 (see below) 3.Small discussion about tomorrow’s asst (F) notes 4.More W-E-P test corrections 5.Asst: finish G 1.#5-6 2.Do % error for 1-6 (difference / average x 100%) 3.Do “energy lost as a % of the initial energy” for Lecture notes 2-D problems w/ equations / ASST H – pushed to next week!! 5.Binders due tomorrow! AP Thurs 12/8
(Mrs. Lewis at Negotiations) Work period – asst F (14 problems that use everything you know so far!) Work together & help each other – ALL OF YOU! BINDERS DUE! (Put them in the boxes in the back!) (Experiment Portfolios up to W-E due next Friday!) AP Friday 12/9
AP Monday 12/12 1.Collect 2D problems (xc only counts if turned in today at beginning of class) 2.Go over Pendulum page on last test 3.Go over (hard) asst F (90% of next test) –p189#12 –Ballistic pendulum, ch 10#39 4.Look at example for 2D with equations 5.Asst: H parts a & b
Tuesday –1 page last test –Concepts & finish H Wednesday –1 page last test –Concepts & start I Thursday –last page of last test –Concepts & finish I Friday –Center of mass (asst B)