1. Newton's First Law of Motion
How many "laws of motion" did Sir Isaac Newton propose? What is Newton's First Law of Motion (and what is it sometimes called)? What do the two parts of the law predict? How does the law apply to your own life? Name at least two ways that it can help to keep you safe.

Consider This Before Answering the Questions

• To see this "law" in motion, visit http://www.physicsclassroom.com/Class/newtlaws/U2L1a.html. Reading the text at this site, what are some of the applications described? Have you ever had these experiences? What are some applications that you've experienced yourself?
• Click on the two animations
  http://www.physicsclassroom.com/mmedia/newtlaws/cci.html
  http://www.physicsclassroom.com/mmedia/newtlaws/il.html
  and then state how they can help keep you safe.
• Next, link to the "unbalanced force" site at http://www.physicsclassroom.com/Class/newtlaws/U2L1d.html. Read the text and then answer the four questions in the Check Your Understanding section. Then, move on to Lesson 2, answering the questions for each section (three in the first, ten in the second, and two in the final section of Lesson 2). Be sure to write down your answers before checking them on the site.

After You Answer the Questions
How accurate were you in your responses? Where did you have trouble? How did the explanations help you understand the material better?

2. Newton's Law of Gravitation
Follow the recommended links at (below) to further explore antigravity by creating an antigravity environment. How does this relate to what you have learned in the text about Newton's Law of Gravitation?

Consider This Before Answering the Questions
Here's a fun experiment to test Newton's Law of Gravitation. Explore antigravity at http://www.everydayscience.org/fun/antigravity.html. Follow the instructions for creating an antigravity environment.




After You Answer the Questions
What happened? Explain how/why you were able to keep the water from pouring out of the straw.