Every Saturday we highlight three resources that have received particularly heavy traffic from website visitors during the past week. This week's winners are …
One of our top Tutorial pages this week was our page on the Momentum Conservation Principle. This is a second page of a six-page lesson focusing on how to understand and analyze a collision or an explosion. The page begins with a logical presentation of the basis for the law of momentum conservation. It then explains the meaning of momentum conservation using an analogy with money conservation in a financial transaction. The two characteristics of momentum conservation are clearly described: the momentum change of one object is equal and opposite to that of a second object and the total system momentum is the same before and after the collision or explosion. The page combines graphics, tables of numerical data, examples, videos and a Check Your Understanding section to bring learners to a clear understanding of what momentum conservation involves.
2. Momentum and Impulse Concept Builder
The Being Impulsive About Momentum Change Concept Builder is designed to help students build an understanding of the impulse-momentum change theorem. The main outcomes are an understanding of how an impulse changes the momentum of an object from an initial state to a final state. There are three difficulty levels in the Concept Builder - Apprentice, Master, and Wizard. Question-specific help is provided for each question. The built-in score-keeping makes this Concept Builder a perfect candidate for a classroom activity.
3. Egg Drop Simulation at The Physics Interactives
The Egg Drop Interactive provides a virtual egg drop activity. Learners can vary the mass of the egg that is dropped, the height from which it is dropped, and the surface onto which it is dropped. The egg drop is simulated and the result is displayed. The impulse-momentum change theorem is used to show how the force is calculated from the egg drop parameters that are selected. The Interactive provides a eggcellent demonstration of how alterations in one variable affect another variable.
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