WHY? Motion, friction, acceleration, gravity, and energy are always in view when we discuss Newton's Laws of Motion. There is friction when any object moves and rubs against another. That is why the unopened matchbox will fall over everytime. The matchbox bounces because it cannot lose all its energy and has to keep on moving. But when the inner tray of the matchbox is open, only the inner tray keeps on moving. Friction quickly brings the box to a stop, so that the box does not bounce. Because of the change in shape of the box (with the inner tray open), it causes friction which takes up the energy by turning it into heat. ASSESSMENT: Can the student communicate what they observed?

Student is able to communicate that the energy of colliding objects has to go somewhere. The student is also able to explain where the energy goes in the two parts of the experiment. Student is able to communicate that the energy of colliding objects has to go somewhere. The student is able to mostly explain where the energy goes in the two parts of the experiment. Student is able to communicate that the energy of colliding objects has to go somewhere. The student is able to give a partial explanation where the energy goes in the two parts of the experiment goes. Student is able to communicate that the energy of colliding objects has to go somewhere.

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Last modified: Fri Feb 13 16:11:36 PST 1998

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