Today we talked about the three kinds of frictional forces: static, sliding, and rolling. Students were asked to share and explain their pictorials of each type of friction (yesterday's homework) on the whiteboard.
We also watched two short video clips. The first was made by the creators of Myth Busters. In it, we discovered the answer to the questions, "When the pages of two books are interlaced, it's possible to pull the books apart. Why?"
We watched part of a second clip called the "Rules of Force and Motion" from The Learning Channel. It covered the following questions:
Today we had a lively discussion about friction. Friction is one of the natural forces involved in Newton's 1st Law of Motion (also known as the Law of Inertia). There are three kinds of friction: static, sliding, and rolling. We discussed the effects of all three on our daily existence.
Homework: Students are to read 4 pages in their textbook. Re-read pages 310 and 311; then finish reading section one of Chapter 11 (p. 314-315). After reading, they are to create a basic picture rendition of each of the three kinds of friction in their science notebooks. We will share and discuss these in class tomorrow.
Today we had a long classroom discussion about forces. What forces are at work in our lives? We discussed net forces and friction, balanced and unbalanced.
Homework: Read pages 310-313 in your textbook and take notes in your science notebook. You will have a three question quiz tomorrow and will be allowed to use your science notebook on the quiz.
Mrs. Tricia Hozie is a junior high and high school science teacher at Pinnacle Prep School in Texas.