# HP Cycle 23

## 1/26 - 1/31

Th 1/26

F 1/27

M 1/30

T 1/31

### 🟢 5: Th 1/26 - "work"

The concept of “work” is slightly different than the definition we use in every day life. Today, we will review how to calculate work and how this relates to the concept of energy.   We will also define gravitational potential energy as well as kinetic energy, and derive equations for both.

Presentation: Work & Energy Presentation (we will try to get through slides 1-22 today)

Optional Extra Practice: Page 1 in Work & Energy Packet.  (Unit 6 CompuSheets Answers

HomeworkAssessment on Gravitation and Circular Motion on Tuesday, January 31st (3rd marking period)

### 🔵 7: F 1/27 - 📄dynamics review

During sub study today, do a few problems which will require you to remember everything you have learned so far this year.

Homework:  These problems will be collected at the beginning of class on Tuesday, January 31st (test day, 3rd marking period).  Assessment on Gravitation and Circular Motion on Tuesday, January 31st (3rd marking period).

### 🟩 5: F 1/27 - 📄dynamics review

During sub study today, do a few problems which will require you to remember everything you have learned so far this year.

Homework:  These problems will be collected at the beginning of class on Tuesday, January 31st (test day, 3rd marking period).  Study for Assessment on Gravitation and Circular Motion on Tuesday, January 31st (3rd marking period).

### 🟦 7: M 1/30 - "work"

The concept of “work” is slightly different than the definition we use in every day life. Today, we will review how to calculate work and how this relates to the concept of energy.   We will also define gravitational potential energy as well as kinetic energy, and derive equations for both.

Presentation: Work & Energy Presentation (we will try to get through slides 1-22 today)

Optional Extra Practice: Page 1 in Work & Energy Packet.  (Unit 6 CompuSheets Answers

Homework:  Don't forget to complete packet of problems from sub study due at the beginning of class Tuesday, January 31st (test day, 3rd marking period).  Study for Assessment on Gravitation and Circular Motion on Tuesday, January 31st (3rd marking period).

### 💚 5: T 1/31, 💙 7: T 1/31 - 📓 energy conservation pendulum lab (1)

Today, we'll start by finishing the Work & Energy Presentation (slides 1-22) if we had not finished them last time.

Then, we'll do a lab where we investigate how work and energy are related.  You'll observe how energy transformations occur in a simple pendulum.  You'll learn to use a Vernier photogate timer to find the velocity of the pendulum.  Here's the setup:

Raise the pendulum mass to a height above its lowest (equilibrium) position.  Release and measure the velocity as it passes through its lowest position.  Repeat for at least 6 different release heights.  Graph velocity (m/s) vs. release height (m).  Find the mathematical relationship (equation) between velocity and release height, linearizing the graph if necessary.

Answer the following analysis questions in your lab notebooks: