DAY 21

***My voice is wrecked. Be sure to listen for my "3...2....1" when I'm getting your attention. 

Also, today's homework has a 24 min video. It's long. If you're on point today in class, you'll have time to watch part of it in class. OR, watch some during breakfast (period 2)***

#Goals: SWBAT...

1. determine possible sources of error

2. assess the reason an error occured

3. solve acceleration problems with ease

WARM-UP:

Yesterday, we reviewed how to calculate error. Today, we'll review how to determine what caused error. 

1. Imagine your measured value for gravitational acceleration (g) is 6.0m/s2 - considering the accepted value is 9.8m/s2, did you get a result which is too low, or too high?

2. Which two things did you measure in our experiment? Which of those items is more likely to have error?

3. What error in time measurement (too short, or too long?) would have caused a value of g that is too low? (Recall: a=2Δx/t2)

4. What error in displacement measurement would have caused a value of g that is too low?

CLASSWORK:

1. Lab Work Time

    this is individual work, however you can consult with your groupmates

    - make any remaining calculations 

    - check answers with group-mates

    - answer conclusion questions

    - write conclusion

    Lab due Monday, via Schoology.

2. #021A: Acceleration practice problems

    A. Marco is looking for a used sports car. He wants to buy the one with the greatest acceleration. Car A can go from 0 m/s to 17.9 m/s in 4.0 s; car B can accelerate from 0 m/s to 22.4 m/s in 3.5 s; and car C can go from 0 to 26.8 m/s in

6.0 s. Rank the three cars from greatest acceleration to least, specifically indicating any ties.

    B. A car with a velocity of 22 m/s is accelerated uniformly at the rate of 1.6 m/s2 for 6.8 s. What is its final velocity?

Learning at Home (HW)

1. Work on your lab - due Monday by 11:59pm

2. #021B: Learn about position-time, velocity-time, and acceleration-time graphs: This video is 24 minutes - I suggest you split it into three parts, p-t, v-t, and a-t :)

Go to https://edpuzzle.com/media/57bb16e77280a6453282394c

Take notes and write the answers for credit. Review Mr. P's notes here --> LINK

OLD MATERIALS BELOW - DISREGARD

#Goals: SWBAT...

1. choose the appropriate UAM equation

2. use algebra to solve for the unknown

3. clearly express their lab procedure

4. solve kinematics problems independently

Warm-Up (5min) 

If your given information and unknown include the following, which UAM equation should you choose? 

After choosing an equation, rearrange it to solve for the unknown.

1. given: vi, a, Δt    unknown: Δx

2. given: vi, vf, Δx    unknown: Δt 

CLASSWORK

1. #021A: Lab Write-Up, Pt. 1

Treat this as a rough draft of your write-up for lab #2. 

Title your Lab: Lab #2: Projectile Motion: Ball in a Cup

For today, you need the following sections: title, group member names, purpose (it's HERE in the pre-lab) (there was no hypothesis), materials, procedure (for a procedure example, here's the link to Lab #1, LINK)

2. #021B: Exam Prep

A link to the study guide will be here: LINK

Exam will be next Monday

At Home Learning (HW) 

Two short videos

1. #021C:

INERTIA

Take Notes: LINK 1

Watch the video, and answer the EdPuzzle Questions: LINK 2

FORCE

Take Notes: LINK 1

Watch the video, and answer the EdPuzzle Questions: LINK 2