Performance of Understanding - Kinematics (6-12/02/13)

Observing the phenomena

• Download the 2 videos on your iPad from dropbox (Y3 LTL Class->Assignments->02 Kinematics->02 Assignments Video x.yyy)
• Observe the motion of the ball in each video. 
• Post your ideas about the motion of the balls for the following questions HERE.

Research the observed phenomena

Conduct an in-depth study of the 2 motions of the balls using your knowledge of kinematic motion, graphs and equations.

Present your research findings using the lab report format (modified from modelling instruction course material 2007). A sample of a lab report (handwritten version) can be found here.

Submission

• You are advice to spend one and a half hour for this assignment.
• iMessage me for clarification by 9/2/13.
• Submit your report as a pdf (type written or neat handwriting using iOS app with any images collected) to me via email by 13/02/13 (Wed).

Technical Advices

Frame-by-Frame analysis using CoachMyVideo

In videos that we film for physics analysis, there is always a reference length (a metre rule, calibrated stick, etc) near to the object in motion. In the 2 videos, the distance between successive markings on the stick is 10 cm.

• You can use your own ruler to measure the position of the object and make use of proportion to determine the position of the object from a reference point. 
• You may want to use adhesive tape, that is not too sticky, to secure your ruler to the iPad screen for ease of taking measurements.

iPad apps for collating lab report

• Penultimate - handwritten notes with ability to attach images and sync with Penultimate
• Evernote - typewritten report with image attachment. However difficult to write formulae
• Neu.notes - similar to penultimate but is a paid app
• Pages - microsoft equivalent for iOS devices. Very expensive!

Motion of an object (Assignment)

How do you describe a moving object?

Data collection

1. Download the following video from Dropbox using your iPad

• Dropbox app -> "Y3 LTL Class" -> "Classroom activities" -> "02 Kinematics".
• Access "Video1.mp4", click the star icon on the top right hand corner to start the download.
• Once downloaded, click on the "download icon" at the extreme top right hand to "Save to Photo Library".

2. Open the video using CoachMyVideo app to view downloaded video, capture the object's positions and clock readings (the reading on the top left hand).

3. Use Graphical Analysis app to determine the relation between the 2 quantities.

4. Repeat step 1 to 3 for "Video02.mp4" for the 2 moving objects.

5. Take photos of your data collection and screenshots of the graph produced and email to me.

Questions

After completing the data collection and analysis, please complete these questions.

Motion of a falling object (Measurement practical)

Scenario

An object (eg. a rubber ball) is dropped from the 4th floor.

• Predict the motion of the ball.

Task

As a group, design a experiment to investigate the motion of a ball dropped from the 4th floor. Appoint a group leader and a scribe/photographer for the activity.In your account youshould pay particular attention to

• the variables you will consider for falling objects,
• the apparatus you use,
• the procedure to be followed,
• any safetyprecautions you would take,

Represent the data collected in a manner that helps you to justify your predication of the motion of a falling object.

Identify the possible error(s) in your experiment.

(Hint: You will probably need to

• refer to the height measurement task that you did on Monday 7/1/13
• use Movie app/CoachMVideo app to capture the fall
• use CoachMVideo app for frame-by-frame and for position/timing)

Submission

• Email completed softcopy writeup before 1159 pm on 13/1/13. We need the data for the lesson on Mon 14/1/13.
• Complete the questions found here before 14/1/13.

 

Some suggested apps or tools for writeup:

• Evernote - type, sketch (with skitch), insert photos, etc
• Note - type only
• Pic Collage - difficult to type but very good for visual representation using photos
• Google Docs - easier to use on laptop/desktop, easy to collaborate on the same document

Using CoachMVideo App

 

 

 

 

Using google drive to manipulate data

You need a Google account, download iOS google drive and log in.

Create "New Spreadsheet"

Use formulae to compute the new cell value