Inclined Plane Lab

Today you completed a small lab to find if the angle of an inclined plane affects its efficiency as a machine:

You also have some homework, due Wednesday: p.162 #47 & 89

Machines

Today we very briefly talked about machines and efficiency.

Notes: Machines

Your homework is a little half sheet called HW: Machines. I checked your Energy of a Bouncing Ball Lab while you started that homework.

On Monday/Tuesday nest week you will be completing a lab. The goal is to find the frictional force on a cart rolling up/down a ramp, plus find the efficiency of said ramp. How you do these two things is up to you, so start thinking about it over the weekend.

Power

Notes: Power!

Here is the solution to the last example problem:

Homework: p. 162 #45, 50 (use Watts instead of horsepower), 56 

Work Due to a Variable Force

Today we found the work due to a variable force with graphs and used that to find velocity at a given position.

Notes: Work Due to a Variable Force (remember to download and run as a slideshow)

We practiced in class with Energy TIPERs #5 (email miss.volkening@gmail.com for a copy). This was NOT turned in for a grade.

Homework tonight is Chapter 5 (p. 163) #59, 60, 61

Lab: Energy of a Bouncing Ball + Work Problems

Today we completed the lab Energy of a Bouncing Ball.

We also went over how to solve energy problems that includes work by doing one together. Your homework tonight is to finish your lab and also complete Energy TIPERs #4 (email miss.volkening@gmail.com for a copy). Warning: Energy TIPERs #4 is not easy.

Here is the problem solved with numbers:

And again without numbers first:

Work

What is work? This is not a philosophical question.

Notes: Work

We worked on Energy TIPERs #3 in class today, which you kept as notes.

You will be doing a lab on Monday/Tuesday and probably picked it up:

Homework is p. 158 #8, 9, 13, 16

Energy Conservation Practice

First we went over #37 from yesterday's homework:

We spent the rest of the period practicing more problems. If you didn't finish in class, these are homework:


Energy Conservation Practice (email miss.volkening@gmail.com for a copy)
p. 160 #32 & 38

PSAT

Today everyone except seniors took the PSAT. I only saw 5th period, and they had study hall. Remember that the following are due tomorrow:

Energy TIPERs #1
Energy TIPERs #2
p. 106 #25, 33, 37

We will be doing part of #37 together tomorrow.

Mechanical Energy

Today we started talking about mechanical energy and its conservation:

Notes (remember to run as a slide show!)

This left about 10-15 minutes left in the period, but hopefully you used it to start your homework:

Energy TIPERs #1 (email miss.volkening@gmail.com for a copy)
Energy TIPERs #2 (email miss.volkening@gmail.com for a copy)
Ch.5 (p.160) Problems #25, 33, 37

Forces Practice Test

I am posting this early because there will be a fair number of people gone on Monday. On Monday, Tuesday, and Wednesday we will have unstructured work time to prepare for the Forces Test on Thursday. You are getting extra time for this test because I don't want to start a new unit before fall break and I also because I presume you will have tests/quizzes/projects in many of your classes this week.

So, here is your practice test:

Forces Practice Test (this file repeats the problems twice for printing purposes)

Below are some videos I made a couple of years ago. They might help you with some of the problems, but keep in mind that these might not perfectly match your practice test and the grading will probably NOT be the same.

#1
This one is like #2, though it is solving for something else 
#3
#4

Also, the key: