Final!

Your final is today! I will have them graded and put in the computer before I go home. I will also send a text out on Remind when they are done.

All late work, lab corrections, extra credit, etc. need to be in my hands or in my email inbox by 8 AM Friday. If you want to retake a test, you can come in after school today or tomorrow or at 8 AM Friday.

Have a good break, and get some sleep.

Momentum (and Final) Practice Test

We don't have enough time for a unit test on momentum, so instead your final will consist of multiple choice problems from the whole semester and free response problems only from the momentum unit.

Here is the practice test for the free response section of the final. The best way to study for the multiple choice section is to review the multiple choice problems from previous tests and practice tests.

Here are the video solutions for the free response practice problems:

#1
#2
#3
#4

Please please please email (or show) me your Finding g With Centripetal Force Labs if you have not yet done so. Use miss.volkening@gmail.com. I will email you feedback, and you can make corrections.

Everything - late work, extra credit, lab corrections, whatever - must be in my hands or in my email inbox by 8 AM Friday, 12/23.

Impulse Due To a Variable Force

What is the change of momentum due to a force that is not constant? This was the question we attempted to answer today.

Notes!

Homework: Chapter 6 (p.191) #8 & 15 + CONCEPTUAL #11 (p.190)

Impulse

So far we've only talked about situations where momentum is conserved - that is, there are no outside forces. Today we talked about what happens when there are outside forces - the momentum changes! This change in momentum is called impulse.

Notes on Impulse

Video we watched

Homework is Chapter 6 (p.191 ) Problems #9, 11, 13 + CONCEPTUAL Problem #12 (p.190)

Ballistic Pendulum Lab

What you need to do today:



Your pre-lab will be graded like a homework and you will get participation points for doing the lab.

Here is a running list of things people discovered about the lab apparatus (I'll update as needed):

• The mass of the pendulum bob is 86.2 g; don't try to measure that yourself
• Pull on the circular knob at the back to cock the launcher, not the stick-like knob near the front
• Flick the stick-like knob near the front of the launcher to launch the ball, not the circular knob at the back
• Don't use the third notch
• Cock the launcher and THEN load the ball
• If your table is uneven the launcher is less likely to work. Use the counters around the outside of the room
• The angle indicator is off on some of the launchers; check yours and compensate as needed

Homework is p.193 #36, 37, 40

Collisions

Today we talked about collisions, which are really just another kind of momentum conservation problem.

Notes: Collisions

The PhET collision simulator is here.

Homework tonight is Ch. 6 (p. 192) #29, 31, 34

You may also want to start your Ballistic Pendulum Pre-Lab.

Conservation of Momentum

Today we had very few notes:

Notes: Conservation of Momentum

The rest of the period was yours to start your homework since it's a bit longer than yesterday's.

Homework: Ch. 6 (p. 192) #25, 26, 27

Momentum Intro

We squeezed in the intro to the next unit today:

Momentum Intro

Your homework is Chapter 6 (p.190) #1, 3, 6, 7

Rotational Motion Practice Test

Rotational Motion Test Practice

Answers

Solutions videos:
#1
#2
#3
#4
#6
#7
#8
#9

Remember that any of these numerical problems could be a symbolic problem (no numbers) on the test.

Orbits

Today we combined universal gravitation and uniform circular motion to find the mass of the earth given the radius and period of the orbit of the moon.

There is no homework, but you probably picked up your practice test today. We also have a small vector quiz tomorrow.