Module 3: Chapter 3: Force, Work, and Power Discussion
This discussion aligns with the following Module 3: Chapter 3: Force, Work, and Power objectives:
- Explain and apply Newton's first, second, and third laws. (CLO1)(CLO2)(CLO3)
- Discuss the requirements for and consequences of balanced and unbalanced forces (CLO2)(CLO3)
- Identify action-reaction pairs (CLO2)(CLO3)
- Discuss the components needed for work to occur (CLO2)(CLO3)
Do not start a new thread. Simply reply to my posting.
Be sure to comment on at least two of your classmates' postings. Your response should be at least 5 sentences long. This includes responses to classmates' posts. Your replies must be more than a simple phrase like "I agree" or "I like your answers". Replies should reflect why you agree or like what has been posted. Your replies must reflect a genuine effort to engage your fellow classmates regarding the comments provided or the problem that has been solved. Please think about the questions and your peers' responses and reply thoughtfully and courteously, according to netiquette rules. Use good English grammar, correct punctuation, and complete sentences. While the posts will mostly be judged by their thoughtfulness and completeness, I reserve the right to take off points for grammatical errors, especially if they interfere with the clarity of your post.
Your initial posting is due on Monday by 11:59 pm CST. Your responses to 2 of your classmates are due on Saturday by 11:59 pm CST.This discussion is worth a maximum of 10 points. The rubric for the discussion is in the Syllabus
Please post your answers and replies to the discussion questions below
1. Newton's first law states that an object will move with a constant velocity if nothing acts on it. This seems to contradict our everyday experience that all moving objects come to rest unless something acts on it to keep it going. Does our everyday experience contradict one of Newton's Laws? If it does not, explain the apparent contradiction. If it does, explain why we bother to teach Newton's first law anyway.
2. Newton's second law written in equation form states a= FNET/m
Your roommate says “That's silly. Everyone knows it takes a force to keep something going at a constant velocity, even when there's no acceleration.” Do you agree with your roommate? If so, explain why physics classes bother to teach the law. If you disagree, how would you try to convince your roommate of the error of his/her ways?
3. Use Newton's Third Law to explain how goldfish swim.
4. Explain how you could move an object and still do no work.