Every Saturday we highlight three resources that have received particularly heavy traffic from website visitors during the past week. This week's winners are …
Pages on Newton's Laws are always popular pages on our website. This week, the Newton's Third Law page at our Tutorial was particularly popular. This is the first of a two-page lesson describing Newton's so-called law of action-reaction. There are so many misconceptsions among students regarding the topic; the lesson addresses common misconceptions and difficulties. Force is described as a push or pull that results from an object's interaction with another object. As the page puts it, "forces always come in pairs" - action-reaction force pairs (or better yet, interaction force pairs).
2. Interference Concept Builder
The Wave Interference Concept Builder targets student understanding of what interference is, of the distinction between constructive and destructive interference, and of how the principle of superposition can be used to determine the shape of the resultant wave (or wave sum) that results from the interference of two waves. There are 20 total questions organized into 10 different Question Groups and spread across three different activities.
3. Roller Coaster Model at The Physics Interactives
One of this week's hottest simulations was the Roller Coaster Model. This Interactive allows a learner to study the interplay between forces, accelerations, velocities, and kinetic and potential energies for a roller coaster car. The track can be modified by lowering and raising strategic locations and by changing the amount of curvature of loops and hills. The simulation is accompanied by a classroom-ready exercise. It is an HTML5, mobile-friendly Interactive that suits itself as an ideal accompaniment to any classroom, but especially for the 1:1 classroom.
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