In their Forces and Interactions science lesson, students in Mrs. Rebecca Wolf’s 3rd-grade class used observations of the cause-and-effect relationship between forces and motion to explain changes in motion. Students began their investigation by observing objects at rest and describing what forces are acting on them: gravity, friction, and the force of the floor.
They then connected their observations to Newton’s First Law that states an object at rest remains at rest unless acted on by another force. The 3rd graders were then challenged to put Newton’s Law to the test by conducting an experiment using a cup, index card, and washer. They placed the index card and washer on top of the cup, and then with one hand, flicked the side of the card with a sharp force.