Today's mini-review CPS session is UP

Check the Linsky files for today's CPS session.

To recap, the toughest question was the size of Δp.

Δp = p_f - p_i and we know its direction is rightward.
p_i = (1 kg m/sec left, 1 kg m/sec down)
p_f = (1 kg m/sec right, 1 kg m/sec down)

Subtract horizontal components, final - initial:
     1 kg m/sec right - 1 kg m/sec left
which is just like
     +1 kg m/sec - (-1 kg m/sec)
and that totals +2 kg m/sec, which is the answer.

Note: the vertical components do not change at the impact, so Δp = 2 kg m/sec rightward and nothing vertical.

CPS pointage updated from last week

I just updated the CPS points from last week, Lecture 19 and Lecture 20 sessions. The corresponding Linsky Files are also in place.

Interesting:

1. 10 Linsky Files from 10 CPS sessions
2. 9 homework assignments.

By the end of the semester we will probably be 20 each, maybe more.

Aggie's and Jarvis' angular momentum project

I just uploaded to the angular momentum movie, with Aggie and Jarvis from Spring 2007, to iTunes U, You can download it and view it in compact form, known as the "summer_version."

S.I. Review session

Breaking news on the exam preparations:

MAP 109 is reserved for the Physical Science review session on Tuesday 10/14 from 2:00 to 4:00pm.

Be there if you can squeeze it in, even 15 minutes!

HW 8 is ready, but are YOU ready?

There are some potentially brain-burning energy questions in HW 8. Plus one simple angular momentum calculation. It is due on Wednesday, 3:30 PM, as usual.

Attempt 5 now available

You can now take a 5th attempt at the Mega-combo homework, HW 7, as mentioned in lecture.

OOOPS

HW 7 was accidentally set to stall out after one attempt, but I intended to give you all 4 attempts.

It is fixed now, and you have until 10 PM tonight to get in your attempts, a short extension. Sorry for the mixup.

Homework 7 is ready

The Mega-combo homework is now ready for study and calculation. Look in the Monsters. Inc. icon in Webcourses.

Stragglers

There are always a few stragglers on the first exam:

1. no PID on scantron,
2. you forgot your clicker,
3. etc.

When that happens, everything slows down for me, and for you because I have to dig out your exam paper and your scantron from two big unalphabetized piles. Heinous.

Exam scores are UP.

Last night I finally received our scantron scores - wow, that was a long wait. Anyway, all your scores are now UP in Webcourses. Look in your gradebook page, and you will see something like this:

The total score is made up of three subscores: scantron, regular SMA and bonus SMA. I also added in a non-numeric row to signify whether I gave you partial credit on the baseball brain burner in SMA bonus subscore, for which the answer was 20.4 meters. I will discuss the partial credit in lecture. If you got it, it is in the SMA bonus subscore. Total possible was 48 points.

Overall, the exam was OK. Almost everyone passed. Nobody aced. Lots of good scores.

Remember: we are shooting for 90% average on the first two midterms, if you want to qualify for Special Study Group (SSG) leader and bypass the final exam.