Upcoming Deadlines Fourth Homework (Analyzing Video) Due Thursday, Sept. 15 th (This week) 15 points (10 points if late) Fifth Homework (Path of Action Analysis) Due Thursday, Sept. 29 th (Two weeks) 15 points (10 points if late) For full schedule, visit course website: Pick up a clicker, find the right channel, and enter Student ID
Pick up a clicker, find the right channel, and enter Student ID. Upcoming Deadlines. Fourth Homework (Analyzing Video) Due Thursday, Sept. 15 th (This week) 15 points (10 points if late) Fifth Homework (Path of Action Analysis) Due Thursday, Sept. 29 th (Two weeks) - PowerPoint PPT Presentation
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Fifth Homework (Path of Action Analysis)Due Thursday, Sept. 29th (Two weeks)15 points (10 points if late)
For full schedule, visit course website:ArtPhysics123.pbworks.com
Pick up a clicker, find the right channel, and enter Student ID
Homework Assignment #4We will be using a video analysis program called
"Tracker" to study motion. Download a copy of the program from the Tracker website:
http://www.cabrillo.edu/~dbrown/tracker/
Run the Tracker program on your computer, import the video clip of a falling object that you created in the previous homework assignment and analyze the falling motion.
This assignment is due by 8am on Thursday, September 15th (this week).
Homework #4
HorizontalMotion
VerticalMotion
Image you post on your blog should look something like this.
Activating your Clicker* Turn on your clicker.* Enter the channel number or letter for
joining this class. Hit Enter/Send key.* Clicker should read AP123KF11* Type in your student ID; hit Enter/Send.Clicker is now ready to use; leave it on.
Hit any key to wake the clicker from sleep mode.
Survey QuestionHow easy have you found it
to use the Tracker software?A) Pretty easy to useB) A little confusing but OKC) Frustrating to useD)Haven’t tried using it yet
Note: You score 1 point of credit for answering survey questions, regardless of your answer.
Review QuestionWhat’s wrong with the spacings in these drawings of a ball thrown in the air?
A) Vertical spacings wrong; horizontal spacings are OK.
B) Horizontal spacings wrong; vertical spacings are OK
C) Both vertical and horizontal spacings are wrong.
D) Actually, the spacings are OK for this path of action.
Review QuestionC) Both vertical and horizontalspacings are wrong.
The vertical spacings are too uniform; the motion should slow in as it rises.
The horizontal spacings should be uniform but instead they slow out going left to right.
Madagascar 2 (2008)Carefully observe the path of action when the plane is in the air.
The bus should be in the air for about one second (although in the movie it’s over seven seconds).
Missing section is about two bus lengths, which is 80-90 feet. At 65 m.p.h. you travel about 95 feet per second.
Speed (1994)Since the bus is in the air for about a second it drops 16 feet so the angle of the bridge would have to be about 10 degrees for the bus to land correctly on the other side.
90 feet
16 feet
Popping a wheelie does not help!
Speed (1994)The film makers did not jump a bus over a gap in a bridge. In fact the gap in this bridge is fake; it was painted in digitally.
However they forgot to paint out the shadow on the ground.
Speed (1994)
This part of the film was digitally painted in.
The bus jump is a stunt filmed with a real bus but the gap is fake.