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NEW at The Physics Classroom: Match That Free-Body Diagram

We're pleased to announce that we just completed another Concept Builder – titled Match That Free-Body Diagram. The Match That Free-Body Diagram Concept Builder challenges a learner to utilize an understanding of force types in order to identify the free-body diagram that is consistent with a given verbal description of a physical situation. Learners make decisions about what types of forces are present, the direction of such forces, and the relative strength of such forces in order to select the appropriate free-body diagram from among a selection of five. There are 12 different situations and two different levels of difficulty. In each situation, the learner is presented with a verbal description of a physical situation. They are given a set of five free-body diagrams to choose from and must select the most appropriate diagram that is consistent with the described situation. Question-specific help is provided for each of the 12 situations. The built-in score-keeping makes this Concept Builder a perfect candidate for a classroom activity.

Enjoy at …

http://www.physicsclassroom.com/Concept-Builders/Newtons-Laws/Match-That-FBD
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The Physics of Climbing a Wall with a Pole

Imagine a 30-foot wall with a window opening. The SWAT team needs to quickly scale the wall and enter the window. How can they do it? Answer: with a pole and some physics. Learn how at the WIRED blog as Physics Professor Rhett Allain explains the simple physics of this surprising phenomenon.

https://www.wired.com/2017/03/the-physics-of-climbing-a-wall-with-a-pole/

Of course you are going to want to see the video as well. The video is no longer showing on the WIRED blog due to a suspended account. But as of this writing, you can view it here:

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Learning Combos - Newton's First Law

Our goal at The Physics Classroom is to put a variety of types of high-quality materials in the hands of students and teachers. Whether it be through animated graphics, interactive simulations, well-written Tutorial pages, interactive questioning modules, or well-planned review exercises, our goal is to provide easy-to-understand and ready-to-use resources that facilitate good teaching and productive learning. So we would like to suggest four such resources that will be invaluable tools for a student learning about Newton's Law of Inertia. First, Lesson 1 of the Newton's Laws chapter of our Tutorial section includes four pages that details the meaning of Newton's law of inertia. Our Rocket Sled Interactive at the Physics Interactives section provides learners with a means of manipulating the forces on a sledder and observing the resulting motion. Third, Missions NL1, NL2, and NL3 of the Newton's Laws module of Minds On Physics will give one a serious exercise in thinking about the meaning of the first law. There's so much more ... but these are great starting points. And finally, our new Concept Builder titled Balanced vs. Unbalanced Forces will go a long way in helping learners associate kinematic information with the existence of balanced and unbalanced forces. Enjoy them all at ...

www.physicsclassroom.com
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New at The Classroom - Recognizing Forces Concept Builder

The Recognizing Forces Concept Builder is a tool that challenges the learner to identify the types of forces that act upon an object in any given situation. Learners are presented with a description of a physical situation and must identify which forces act upon the object that is described in the situation. There are 10 different situations to analyze and three ability levels. Each situation requires that the learner understand the nature of the various force types. Question-specific help is provided for each of the 10 situations. The built-in score-keeping makes this Concept Builder a perfect candidate for a classroom activity. You can find the Recognizing Forces Concept Builder at …

http://www.physicsclassroom.com/Concept-Builders/Newtons-Laws/Recognizing-Forces
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How Do Drones Fly? Physics, of Course!

Drones are becoming more and more popular and used for more and more reasons. They are becoming affordable and more pervasive. But exactly how do they fly, maneuver, and stay aflight. Physics professor and blogger Rhett Allain explains how on the WIRED website:

https://www.wired.com/2017/05/the-physics-of-drones/
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New at The Physics Classroom: Newton's Second Law Concept Builder

We are pleased to announce that we recently completed the Newton's Second Law Concept Builder. This Concept Builder is a tool that allows the learner to predict the effect of varying net force and varying mass upon the acceleration of an object. There are 12 different situations to analyze and three ability levels. Each situation involves requires that the learner use proportional reasoning and Newton's Second Law equation in order to determine the acceleration that results when the net force and/or the mass of the object is altered. Question-specific help is provided for each of the 12 situations. The built-in score-keeping and compatibility with all devices makes this Concept Builder a perfect candidate for a classroom activity. View the Concept Builder at …

http://www.physicsclassroom.com/Concept-Builders/Newtons-Laws/Newtons-Second-Law
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The Physics of Compound Pulleys

One of the most common topics covered in a high school physics class is simple machines. And perhaps the coolest of all simple machines is he compound pulley. WIRED blogger and Physics Professor Rhett Allain discusses the physics of compound pulleys. Additionally, he provides numerous informative illustrations of a compound pulley and discusses devices that utilize them. Enjoy Rhett's blog at …

https://www.wired.com/2017/01/physics-of-a-compound-pulley/
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What Keeps a Bicycle Upright?

Jim Papadopoulos has spent a lifetime pondering the physcs and mathematics of moving bicycles. Now 62 years old, Papadopoulos' lifetime is characterized by fascination with bicycles that has included competing in races and analyzing their engineering qualities. Numerous questions have fueled his fascination such as ..

What unseen forces allow a rider to balance while pedalling?
Why must one initially steer right in order to lean and turn left?
And how does a bike stabilize itself when propelled without a rider?

This online article from Nature magazine explains some of Jim's insights into these questions and more. Enjoy at ...

http://www.nature.com/news/the-bicycle-problem-that-nearly-broke-mathematics-1.20281
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Physics Interactive: Elevator Ride

Explore the concepts of weightlessness and weightiness with this Interactive from The Physics Classroom website. The Interactive comes with a ready-to-use classroom exercise to help students explore the nature of the normal force and its dependence upon acceleration. The Interactive is an excellent complement to yesterday's post about Rhett Allain's discussion of Zero-G environments. Enjoy at ...

http://www.physicsclassroom.com/Physics-Interactives/Circular-and-Satellite-Motion/The-Elevator-Ride