Mental Math Power Point?

Conserving your Momentum

Today we quizzed section 8.3. Since I'm writing this as you're writing the quiz I can only say that I hope it goes well for you. I'd like to remind you again that we have scheduled a test on Chapter 8 for Tuesday. The remainder of today and most likely Monday will be spent on reviewing for Tueday's test. I will want to discuss some of the harder problems on Monday such as #74 to #84 so over the weekend please have a look at these and give them a try (some of them will be on Tuesday's test).

Have a great weekend.

Impulse?

Energy and springs?!?

Wow.

I don't say that very often, but by the looks of the quizzes you wrote today you're deserving of it. Nicely done. We will need to spend some time on projectile motion but that isn't unusal.

We just stated discussing the conservation of Mechanical energy (9.8) near the end of class. As I tried to show you on the roller coaster as gravitational potential energy decreases, kinetic energy increases and vice versa.

On Monday we'll investigate the differences between elastic and inelastic collisions (though some of us have already discussed this) and complete some examples for section 9.8. Please make sure you have read section 9.8, made some notes, and tried a few questions from the 'the green pages' (maybe the first 5). If you like try this LINK to look at an animated version of what we were talking about today.

Have a great weekend.

Impulse

Today we discussed what impulse was and how to calculate it. As was discovered there are a great number of questions that can be asked once you understand this 'rearrangement' of Newton's second law. The important thing to remember is that one of my favorite questions is #73 (but we'll save that one for Friday...tomorrow we'll quiz impulse only-no graphs).

Energy...need some?

Our work as of late has been about Work and Energy. The highlight of today involved the notion that when work is done on an object the kinetic or potential energy changes. This allows us to determine the amount of work performed on an object while knowing only of the object's mass, initial and final velocity.

On a complimentary note I thought I'd pass along a short note of congratulations and thanks. When you do your homework, teaching you the next concept is much easier for me.

Although tomorrow is planned to be a work session for sections 9.4, 9.5, and 9.6 I don't recommend not doing some homework tonight as I'm sure there are questions we will need to discuss before Friday's quiz.

Physics 12: Study Guide

Today we discussed my 'favorites' in the chapters we've discussed so far.

• pg 224: #9, #10
• pg 225: #11 b or c (w. friction)
• pg 226: #16-18, 22, 24
• pg 227: #26, 27
• pg 114: #19, 29 (case 3), 30 31,32
• pg 117: #38-40, 47, 51, 52, 55, 59-61
• pg 153: 48-50