Here on Earth, we often don't even think about Newton's 3rd Law of Motion - it's just the way things are. If we turn a wrench one way, we don't worry about the effects of that on ourselves. However, in space there is virtually no gravity and Newton's 3rd law can be a VERY big deal.
Why might Newton's 3rd law be something that we really need to consider?
What could go wrong if we don't take time to think about its effects?
How does it make working harder?
Are there any ways that it makes working easier?
Watch the video below, for an idea of how all of this comes together. (Only press the view button - you can't download it).
http://www.teachersdomain.org/resource/phy03.sci.phys.mfw.asrnt/
Again make this a discussion, work off of each other's comments. :-) Don't forget your name and class period!
Thursday, October 7, 2010
Monday, October 4, 2010
A world without friction....
In class we have been learning about friction. In the "Shoe Lab" you were asked how friction can be helpful and how it can be harmful (detrimental). Now let's take it a step further. Think about what it really means for there to be friction and answer the questions below - let's have another discussion.
What would our world be like (how would it be different) if there were NO friction? Would anything be the same? How would we get around? How would we build things? What would it be similar to? Explain what you think our world would be like.
Make this into a discussion. Read all of the comments prior to making your comment. Add to comments, expand on points made, disagree (respectfully) and build up an idea, as a set of Physics 1 classes, of what our world would be like. Feel free to pose new questions as they come up. If you post the same thing as someone else you will not get credit for your post. Make sure you include your name and class period in your post. Enjoy!!
What would our world be like (how would it be different) if there were NO friction? Would anything be the same? How would we get around? How would we build things? What would it be similar to? Explain what you think our world would be like.
Make this into a discussion. Read all of the comments prior to making your comment. Add to comments, expand on points made, disagree (respectfully) and build up an idea, as a set of Physics 1 classes, of what our world would be like. Feel free to pose new questions as they come up. If you post the same thing as someone else you will not get credit for your post. Make sure you include your name and class period in your post. Enjoy!!
Sunday, October 3, 2010
Inverse and Direct Relationships
Inverse and direct relationships can be difficult to understand. It is always easier to grasp a concept if you can relate it to something that is significant to your own life. In your Newton's 2nd Law activity with the skateboard you needed to come up with a real life example of a direct and inverse relationship. Please post your examples as comments so that everyone can see and benefit from them. An example may only be posted once - no repeats! Also, let's make this a bit of a discussion. If you like an example or agree with it, let the person know how it helped you. If you aren't sure that an example is accurate/correct, politely and respectfully voice that for the benefit of the class. Always remember to identify yourself (don't use your full last name!) and class period. When responding to a person's comment, make sure you acknowledge the person in your own comment.
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