Cuesta College, San Luis Obispo, CA
Students have a weekly online reading assignment (hosted by SurveyMonkey.com), where they answer questions based on reading their textbook, material covered in previous lectures, opinion questions, and/or asking (anonymous) questions or making (anonymous) comments. Full credit is given for completing the online reading assignment before next week's lecture, regardless if whether their answers are correct/incorrect. Selected results/questions/comments are addressed by the instructor at the start of the following lecture.
The following questions were asked on reading textbook chapters and previewing a presentation on Newton's third law.
Selected/edited responses are given below.
Describe something you found interesting from the assigned textbook reading or presentation preview, and explain why this was personally interesting for you.
"That two objects exhibit forces on each other of equal magnitude--I would have thought the larger object would have a greater magnitude force."
"The elevator questions were interesting. I had someone explain it in a different way which helped me to understand it. Imagine driving a car and you accelerate. Are you putting more weight against the seat? What about when you break or move at a constant rate. This helped me visualize it much better."
"Newton's third law does not involve velocity, even though it's a law about motion."
"All motion can be categorized into velocity that is constant and unchanging, or velocity is changing."
"Forces are between two objects, because I would think that one object can exert force without another object."
"The three-part POF-OST-ITO checklist, because I feel like this will really help me keep everything straight when I am confused on a problem."
"If one of the three-part POF-OST-ITO checklist does not work then Newton's third law does not apply."
"Two objects can have the same magnitude of force, but the effect can be different based on each object's mass."
"There must two objects exerting forces or there will not be an interaction at all."
Describe something you found confusing from the assigned textbook reading or presentation preview, and explain why this was personally confusing for you.
"Not quite sure how this converts to equation form. Would appreciate it if we could cover a few practice problems concerning this subject tomorrow."
"I understood it pretty well."
"Not sure what is meant mean by internal or external systems."
Consider two categories of motion: (1) Velocity that is constant and unchanging. (2) Velocity that is changing. Discuss whether or not there would be a third category of motion not already covered under these two categories.
"There is no third category. These two categories summarize all types of motion."
"The only thing I can think of is a velocity that is zero and unchanging. But this may be under the first category (1) that is listed."
"There are two factors of motion and two factors of force. Motion: constant or changing. Force: zero or non-zero."
"Constantly changing velocity? Is that the same as the second category (2)?"
"Motion in which the velocity starts and stops during the interval?"
An "interaction pair" (or "interaction partners") refers to a pair of:
objects. ********** [10] forces. ******************************** [32] (Both of the above choices.) ********** [10] (Unsure/guessing/lost/help!) **** [4]
Ask the instructor an anonymous question, or make a comment. Selected questions/comments may be discussed in class.
"Can you please explain the equations related to Newton's third law?" (Strictly speaking, there are no equations associated with Newton's third law. Newton's third law is a statement of a fundamental property of forces. A really important fundamental property.)
"I love mnemonics, so having the POF-OST-ITO checklist is a huge help!" (Me, too. I have CRS.)
"Can we discuss what people were doing wrong or not understanding from Quiz 2?" (This is what the blog posts are for.)
"I need help." (I want to help you. Let's make this happen.)
"Your phone is awesome!" (Apparently awesome can unexpectedly fail. That's what a phone exchange warranty is for.)
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