DAY 70

QUESTIONS? Message me via Remind App

#Goals:

SWBAT...

1. ...correctly answer 80% of the review questions

Warm-Up

Which of the following statements are true of inertia? List all that apply.

1. Inertia is a force.

2. Inertia is a force which keeps stationary objects at rest and moving objects in motion at constant velocity.

3. Inertia is a force which brings all objects to a rest position.

4. All objects have inertia.

5. A more massive object has more inertia than a less massive object.

6. Fast-moving objects have more inertia than slow-moving objects.

7. An object would not have any inertia in a gravity-free environment (if there is such a place).

8. Inertia is the tendency of all objects to resist motion and ultimately stop.

9. In a gravity-free environment (should there be one), a person with a lot of inertia would have the same ability to make a turn as a person with a small amount of inertia.

What can you do to raise your grade? 

• complete the lab

• complete the FBD art assignment for late credit

• retake quizzes

• complete this week's assignments for full credit

• study for the final

• take full advantage of this week of review/study

CLASSWORK

1. 070A: Newton's Laws Review Part 1

    https://www.physicsclassroom.com/reviews/Newtons-Laws/Newtons-Laws-Review-Answers

    Complete the following questions about Newton's Laws, Mass, Inertia, Weight, and Forces

• Conceptual True/False:

  • 1-7

• Conceptual (Thought) and Computational (Calculation) Problems

  • 8b, 9, 10, 12-15, 22-31

NOTE: If you missed the earlier review, here it is again:

• 068A: Kinematics Review Part 1

  • True-False Questions: 2-7

  • Multiple Choice (Conceptual) Questions: 8-28 (skip 22 and 27)

  • Diagramming (Drawing) Questions: Click here --> LINK  answer the following: 29-34

    • check your answers to 29-34 here --> LINK

    • Get work signed by Mr. Potkin at end of period

HOMEWORK:

1. Complete the Review. Due Tuesday.

2. Lab due Wednesday 11:59pm

    - complete data analysis and graphs for lab. Answer questions in C&A and RWP sections

3. Work on final review problems (see below)

4. Quiz Tuesday on Work/Power problem solving

    Review notes from past two days

    Try the following practice problems: 

    LINK: https://www.physicsclassroom.com/reviews/Work-and-Energy/Work-and-Energy-Review-Answers

    Problems: 23, 24, 25, 26, 28, 29cd, 30a

What can you do to raise your grade? 

• complete the lab, due tonight

• complete the FBD art assignment for late credit (I've extended the late credit on this assignment)

• complete any assignment which is a week (or less) late

• retake quizzes

• complete this week's assignments for full credit

• study for the final

• take full advantage of this week of review/study

#Goals:

SWBAT...

1. ...correctly answer 80% of the review questions

WARM-UP:

Which of the following statements about vectors and scalars are TRUE? List all that apply.

1. A vector is a large quantity and a scalar is a small quantity.

2. A scalar quantity has a magnitude and a vector quantity does not.

3. A vector quantity is described with a direction and a scalar is not.

4. Scalar quantities are path dependent quantities and vector quantities are not.

5. A scalar quantity depends only upon the initial and final values of the quantity; this is not the case for vector quantities.

6. The quantity 20 m/s, north is a speed and as such is a scalar quantity.

7. The quantity 9.8 m/s/s is an acceleration value and as such is a vector quantity.

CLASSWORK

1. 070A: Kinematics Review

    https://www.physicsclassroom.com/reviews/1D-Kinematics/1D-Kinematics-Answers

    Complete the following: 

• True-False Questions: 2-7

• Multiple Choice (Conceptual) Questions: 8-28 (skip 22 and 27)

• Diagramming (Drawing) Questions: Click here --> LINK  answer the following: 29-34

  • check your answers to 29-34 here --> LINK

HOMEWORK:

1. Complete the Kinematics Review. Due Tuesday.

2. Complete your Power Lab. Due 11:59pm Monday night. If you've already shared it with me, no need to share it again. Not sure if you shared it? Click the "share" button on Google Docs, click "advanced", and check your sharing settings. 

WARM-UP

**Yesterday, I came back after school, and my only pair of scissors was missing, and the slinky was on the floor. Not happy.**

1. The speed of sound in solid iron is 5,120 m/s.  How long would it take a sound wave to travel through 40,075,000 m of iron?

2. Would a sound wave travel that far?

CLASSWORK

1. 070A:

**use a new sheet of paper - you'll need to turn this assignment in on Friday

Lab – Tuning Forks and Waves

Purpose – make observation about the waves formed by a tuning fork

Pre-lab Question

• 1. The speed of sound in room temperature air is approximately 346 m/s. Calculate the wavelength of the sound wave we heard earlier that has a frequency of 500 Hz.

Observations and Calculations

• 1. You will need two tuning forks, a binder (or short stack of paper to strike the tuning fork on) and a cup with water to complete the observations.

  2. Strike each tuning fork on the paper.  Compare the sounds that the tuning forks make and write one observation.

  3. Observe the tuning fork vibrations with your eyes.  Write one observation about what you see.

  4. Strike the tuning fork and have it touch your ear and nose.  Write one observation about what you feel.

  5. Strike a tuning fork and place it in a cup of water.  Write one observation about what you see.

  6. Calculate the wavelength of the tuning fork using the speed of sound given in Pre-Lab question #1 and the frequency on the tuning forks.

Conclusion Questions

• 1. Why does sound travel faster when the air is warmer? Think: how could you use the definition of a sound wave to help explain your answer. Feel free to use the internet to help find your answer

  2. Which tuning fork has a higher pitch? How do you know?

  3. Compare and contrast the low frequency and high frequency tuning forks

  4. How could you increase the intensity of the sound waves you produced using tuning forks?

  5. Bats can use echo location to navigate and find prey.  If a bat emits a sound then hears it 0.02 seconds later, how far away is the object?