DAY 37

#Goals: SWBAT...

1. Choose the correct UAM equation

2. Answer all five quiz questions correctly

3. Correctly answer all five inertia-related questions

Warm-Up (3 min)

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. 037A: Quiz 7: Projectile Motion Problem Solving

2. 037B: Inertia Practice Questions

    ***want to get a jump on tomorrow and have time to work on your lab in class? Do these five problems today***

    LINK Answer 1, 3, 4, 5, 6

3. 035: Lab #3: Ball in a Cup

    Complete the Ball in a Cup Lab, due Saturday @ 11:59pm, submitted electronically on Schoology

This should include the following. 

TITLE

YOUR NAME 

GROUP MEMBERS NAMES

PURPOSE

MATERIALS

PROCEDURE

    this should be a list of instructions specific/detailed enough that another person could read them, and do the lab correctly. 

DATA

    time data from finding Vx

    free-fall time data from finding Δt

    how you found Δx for the cup

    ***note that you can take a photo of your neat math work showing the above 

RESULTS

    what happened? (where did the ball land? Using your video, you can take a screenshot of the ball landing in the cup (or missing) and upload it to your document). 

ANALYSIS

      SAMPLE CALCULATIONS should be included here. Show how you did all the math leading up to, and including, solving Δx=vixΔt

     Questions:

    - Any errors? You'll need to be specific when discussing errors. For example:

        - state where in an equation you made a mistake, and how that mistake affected your results

        - describe a physical error (mistiming the displacement zone for vx, releasing the ball from too high/too low, tilted table, wrong

        angle for ramp, etc), and state how it/they affected your results. 

        - If you didn't have any errors, why not? What steps did you take that made your lab work so well?

CONCLUSION    

- Sum up the lab (restate your hypothesis, and what you found to be the answer)

- Describe how the lab experience (how did it go?)

- What would you do differently next time?

Learning at Home (HW)

1. Lab #3: Ball in a Cup is due electronically Saturday 11:59pm

2. Kinematics Exam Study Guide: LINK

3. Notes/CW/HW check for this week's assignments, due Friday

    - be organized. Each day should follow this format:

        DAY XX

        Warm-Up

            - whatever it is

        Classwork

            - 36A

            - 36B

            - etc

        Homework

            - notes

            - edpuzzle answers

#Goals: SWBAT...

1. set up a lab experiment without being given specific instructions. (think on your own, folks)

2. collect vx data

3. determine delta x correctly

4. get the ball bearing in the cup, 1st time

Warm-Up (5min) 

Copy, and fill in the blanks: (now that class is over, I filled in the blanks)

1. After measuring ytabletop and ycup, I can subtract them, and solve for Δ t . 

2. Using the free-fall equation, I can then solve for the time the projectile takes to fall from that height. 

3. Seperately, I can set up a ramp & displacement zone, then use the time and displacement to find x-velocity (Vx)

4. Now that I know the flight time and horizontal velocity, I can use that with the velocity equation, vx = Δx/Δt  

5. I'll need to rearrange the velocity equation to solve for displacement, so it looks like...

6. Δx = vx*Δt

7. That's the displacement from the edge of the table to where I put the cup on the floor. 

8. Done. 

CLASSWORK

1. Ball in the Cup

• When you're ready, call me over, I'll bring the cup, and we'll test your skills. 

• If you get the ball in the cup, this is your day, and you're a physics master!

• If the ball hits to the side of the cup, still full credit (why would I give this full credit?)

• If the ball hits long or short, partial credit

• FOLLOW UP

• After you drop the ball, there's still work to be done! Lab write-up time...

• Follow the lab template listed below

• While you collected data as a group, and can consult with group-mates to discuss errors and calculations, your lab write-up is your own work. 

• Grading Rubric  LINK

• Lab Template: LINK

HOMEWORK

- PSAT is tomorrow, so get some rest, eat breakfast, and do your best on the test. It's a great practice to show you where your skills are strong, and where they're weak. Tomorrow we'll have 20 minute classes. We'll watch a video on our next topic, go over the exam, and field any random Lab #2 questions...

#Goals: SWBAT...

1. Define Work

2. List the requirements for a movement to be considered "work"

3. Determine if a scenario represents work

4. Solve work problems

Warm-Up (5min) 

Copy the drawing from the board, then answer the questions listed here. Keep in mind that some of these could be a *tie*

• 1. Displacement: Rank the displacement (distance the car travels) from shortest to longest

• 2. Force: Rank the force required to move the car at a constant velocity from lowest to highest

• 3. Energy: Rank the energy required to move the car from the bottom to the top of the mountain from least to highest

CLASSWORK

1. #037A: NOTES: Work Definition & Equation

    Background:  Newton's laws serve as a useful model for analyzing motion and making predictions about the final state of an object's motion. In this unit, an entirely different model will be used to analyze the motion of objects. Motion will be approached from the perspective of work and energy. The effect that work has upon the energy of an object (or system of objects) will be investigated; the resulting velocity and/or height of the object can then be predicted from energy information.

    With that, over the next few days we will learn about work, power, kinetic energy, and potential energy

    Definition: Work is done upon an object when a force acts upon the object to cause a displacement of the object.

Scenarios: (are these work?)

1. A teacher applies a force to a wall and becomes exhausted.

2. A book falls off a table and free falls to the ground.

3. A waiter carries a tray full of meals above his head by one arm straight across the room at constant speed. (Careful! This is a very difficult question that will be discussed in more detail later.)

4. A rocket accelerates through space.

Mathematically, work can be expressed by the following equation.

W = F • d • cos Θ

where F is the force, d is the displacement, and the angle (theta) is defined as the angle between the force and the displacement vector. The angle measure is defined as the angle between the force and the displacement.

• Scenario A: A force acts rightward upon an object as it is displaced rightward. In such an instance, the force vector and the displacement vector are in the same direction. Thus, the angle between F and d is 0 degrees.

  •  

• Scenario B: A force acts leftward upon an object that is displaced rightward. In such an instance, the force vector and the displacement vector are in the opposite direction. Thus, the angle between F and d is 180 degrees.

  •  

• Scenario C: A force acts upward on an object as it is displaced rightward. In such an instance, the force vector and the displacement vector are at right angles to each other. Thus, the angle between F and d is 90 degrees.