DAY 32
#Goals: SWBAT...
1. solve a constant velocity problem involving vx
2. set up a lab experiment without being given specific instructions. (think on your own, folks)
Warm-Up (5min)
A marble rolls from left to right across a table. You want to measure it's velocity, so you place a meter stick next to it's path. You notice the marble rolls at a constant velocity from 23cm to 58cm in 5.0s. Which equation should you use to find the marble's x-velocity (vx)? Hint: Think back to the video we watched in class on Day 31. You can check the notes here if needed: LINK
Solve for the x-velocity.
If the marble accidentally rolls off the side of the table, and begins falling, will the x-velocity (vx) change?
What is the marble's y-velocity (vy) while on the table?
If the marble accidentally rolls off the side of the table, and begins falling, will the y-velocity (vy) change?
CLASSWORK
1. The Answers to the Warm-Up Are....
1. v = Δx / Δt
2. (58cm-23cm) / 5.0s = 7.0m/s
3. no
4. zero
5. yes, because of acceleration due to gravity
2. Video Preview of Today's Assignment
Watch this --> LINK
Can't see the video? Either use your phone and watch it, check to see you're logged into your LAUSD youtube account (there's a circle at the top right corner of the page - click it), or check the hints below (which is the same stuff that's in the
video)
Note that you should read all the intro info at the top of the page. Info, Purpose, Materials, Task. The questions are structured to build a deeper understanding for you. Use notes and resources from past couple days
Click "edit" to open the drawing. Choose the "line" button to draw. Should the path be curved or straight?
This is in Day 31, in Mr. P's video. This is NOT one of the UAM equations.
Did a few ymax problems in class, and this was in the homework as well. This is one of the UAM equations.
Think about what you traditionally know for problems like these. initial y velocity. accel from gravity.
How are you going to measure the time? Video, and then count the frames? You'll need a certain "material" for that. What is it? Any other materials?
We'd put the ramp here, put the ruler there, use this to keep the ball bearing from falling off the end of the table, etc.... Obviously, you'll be more specific than 'here' and 'there'. Any hey, you can draw a pic if you prefer that over words.
You want to practice a lot before you start collecting data. Get consistent FIRST.
Will you only do three trials? Or ten? Or 15? How many is enough?
I think this is self explanatory
Restate what you're going to measure, then for each of those things, say how you're going to make those measurements. Ruler, camera, other stuff, etc.
it's at the bottom of the doc. Darken the text
When will the object become a projectile? Hint: It ISN'T a projectile the entire time.
I think this is self explanatory
Remember Mr. P said in friday's flipping physics video that time is often what you solve for, and then plug into a second equation. Which of the two equations you chose (x-direction or y-direction) will you use to solve for time?
3. #032A: Projectile Motion Pre-Lab
Collaborate in your groups. Each person must write their answers on their own document, which will be your "ticket" to begin the lab this week. If your pre-lab isn't complete and correct, you'll have to finish it instead of working on the lab with your groupmates....
Find the pre lab document on Schoology, and complete it in class. It's due today.
Need help? Contact me via the Remind App.
At Home Learning (HW)
#032C: More Projectile Motion Practice
Take Notes: LINK 1
Watch the video, and answer the EdPuzzle Questions: LINK 2
Curious about how much drag (friction) affects the flight of the ball? Here ya go! LINK
NEED HELP WITH FREE-FALL? Check out Step-By-Step Science here: https://www.youtube.com/watch?v=62BymeTQ_SM&index=2&list=PLcJ1NYursFxhEH7nL60_Q8SFSpY_jXIre
#Goals: SWBAT...
1. Recall Newton's Three Laws from memory
2. Maintain professional (quiet, thoughtful, respectful, focused on physics) behavior throughout the class period.
3. Help group-mates find answers by asking them guiding questions
4. Match activities with one of Newton's Three Laws
Warm-Up (6min)
Copy and fill in (or choose) the correct answers for the following:
1. When a person shoots a rifle, the forces on the bullet and the rifle are equal and opposite. Why does the bullet accelerate much faster than the rifle? Which law(s) does this example illustrate?
2. Complete the Newton's Laws chart on Slide #3 here: LINK
Use your notes/memory/the internet to find the correct definitions
CLASSWORK
1. #032A: Sir Isaac Newton Olympics
- This is your chance to put all the learning you've done into motion. Before, during, and after, be thinking and talking about which
law fits with each activity.
- On your handout, fix Station #3, question 3. It should read "pulls" not "pushes"
A. Mr. A models steps (LINK) for each station
B. Complete each activity and questions within the allotted time
C. Most professional behavior wins 1 HW worth of extra credit points :-)
D. Staple your group-mates completed worksheets together, and turn them in for credit
At Home Learning (HW)
1. Practice identifying interaction (force) pairs by completing the questions at the following LINK.
2. Quiz tomorrow on Newton's Three Laws. You should have the three laws memorized, and be able to solve problems related to each of the three laws. Review your notes, as well as Day 22, 28, 30, 31
3. Period 1 only: Turn in your Olympics handouts Friday