# HP Cycle 27

## 2/21 - 2/25

T 2/22

W 2/23

Th 2/24

F 2/24

### *Z* β 6: M 2/21, *Z*β 8: M 2/21 - Hooke's Law

1 - 7:40 - 8:24 (44)
2 - 8:29 - 9:13 (44)
3 - 9:18 - 10:02 (44)
4 - 10:06 - 10:50 (44)
L1 - 10:54 - 11:35 (41)
5a - 11:40 - 12:24 (44)
5b - 10:55 - 11:39 (44)
L2 - 11:43 - 12:24 (41)
6 - 12:29 - 1:13 (44)
7 - 1:18 - 2:02 (44)
8 - 2:06 - 2:50 (44)

Quiz on simple energy conservation problems (no friction) TODAY.

Today, after the quiz, weβll investigate how springs behave and learn about Hookeβs Law through an exploratory lab. In the lab, youβll try to answer the following questions:

1. Is the force that a spring applies constant?

2. If so, what is the force for a given spring? If not, how does the force change?

3. Is there energy associated with a spring? In other words, can a spring do work?

4. If so, how can you calculate the work done by a spring?

Handout: Hooke's Law Lab

Homework: Finish the lab. It will be collected tomorrow during class.

### π’ 6: T 2/22, π΅8: T 2/22 - elastic potential energy

Today, we'll review what we've learned about Hooke's Law and elastic potential energy by doing problems from β Positive Physics unit 18: springs & oscillations "work" problems from the following sections (only 5 problems):

• Hooke's law

• spring energy problems

If you finish the above problems, start working on page 1 only of Work, Energy, and Power Review Problems. Page 1 SOLUTIONS. These problems are due to βοΈ Google Classroom by Sunday at 10pm.

Optional Extra Practice: PedersonScience.com.

Homework: Finish these problems by Wednesday at 10pm. Only completion score counts. No late work will be accepted. Write out a solution for the third video below.

If for some reason you missed class today or you need a review, check out the following videos from Dan Fullerton:

Watch examples during time 7:45-11:05 only, unless you want more practice with other conservation of energy problems.

Finally, here's a more complex example like what you'd see on a test. (Think about how you'd do this with our Before & After diagram and our conservation of energy equation. Remember that the spring force is a conservative force.)

### π© 6: Th 2/24, π¦ 8: W 2/23 - power

Today, we'll finish our unit on energy by defining power as the energy per time. After giving a couple of examples, we'll do β Positive Physics unit 13: energy "work" problems from the section:

• power problems

• challenge

Then, continue working on page 1 only of Work, Energy, and Power Review Problems. Page 1 SOLUTIONS. These problems are due to βοΈ Google Classroom by Sunday at 10pm.

Then work on some extra practice below!

Presentation: Power Presentation

Homework: Finish β Positive Physics problems by Friday at 10pm. Only completion score counts. No late work will be accepted. Complete your written solutions of page 1 only of Work, Energy, and Power Review Problems (Page 1 SOLUTIONS) for upload to βοΈ Google Classroom by Sunday at 10pm. Assessment on all of Work and Energy on Monday, February 28th.

Optional Extra Practice:

### π 6: F 2/25, π 8: Th 2/24 - momentum intro

Delayed Opening 2/25

1 - 9:10 - 9:55
2 - 10:00 - 10:45
3 - 10:50 - 11:35
L1 - 11:39 - 12:20
5b - 12:25 - 1:10
5a - 11:40 - 12:25
L2 - 12:29 - 1:10
6 - 1:15 - 2:00
7 - 2:05 - 2:50

Today we will introduce momentum and impulse. We will learn that momentum p = mv and that the change in momentum Ξp = impulse FΞt. We will look at examples of how impulse is altered. We will also discuss conservation of momentum in a collision.

Pd 6 - If there's time after lecture, we'll start the Black History Month video "Leaders of the Future."

Pd 8 - If there's time after lecture, you may start your β Positive Physics unit 14: momentum homework.

Presentation: Momentum Presentation

Homework: Study for assessment on all of work and energy next class on Monday, February 28th. Do problems from β Positive Physics unit 14: momentum "work" problems from the following sections only:

• definition of momentum

You may not be able to figure out the answer to the main questions, so at least do the m, v, and p calculations. Finish these problems by Monday Friday, March 4th at 10pm, but get a good start on these before then. Only completion score counts. No late work will be accepted.

Optional Extra Practice: Page 1 in Momentum Packet (SOLUTIONS)

Additional Pd 6 Homework: Black History Month βπΏβπΎβπ½ Programming. Although we didn't have class time to finish the Black History Month programming, that doesn't mean it's not really important to be informed and to continue watching the video we started in class. Please watch the video below over the weekend. We will spend 15 minutes after the test to discuss your impressions and any connections you made to the video.

Pd 6 - "Leaders of the Future"

Alumni will preverse in conversation about their experiences in college, guide you on what to and what not to do during your experience.