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