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Physics Classroom is making strides to make our site accessible to everyone. Our site contains 6 navigation areas. The Primary, Secondary, and Page Level navigations have a screen reader version of their nav structure that allows using the left and right keys to navigate sibling navigation items, and up or down keys to navigate parent or child navigation items. The others can be navigated using tabs. The Primary Navigation handles the first 2 levels of site pages. The Secondary (which is not always available) handles the 3rd and 4th level of structure. The Page level navigation allows you to navigate the current page's headings quickly. The Header Navigation contains the Light/Dark Mode toggle, Search, Notifications and account login. The Breadcrumb Navigation contains the breadcrumb of the current page. If the current page has a breadcrumb, you can get to it by skipping to the content and tabbing in reverse (shift plus tab). The Footer Navigation contains links such as Privacy, Contact, about and terms. Some resources contain an Audio Player that can be activated by holding down the T key for 3 seconds, and then using K to pause and resume. While not every area of Physics Classroom is usable purely from keyboard and screen reader, we are committed to continue work on making this possible. If you have questions or need additional help, please use this link to contact us.

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The Equilibrium Concept - Directions

Using the Equilibrium Concept Builder is quite simple. There are three activities. The questions in each activity are highly varied. Each question requires that the user tap on the screen one or more times in order to select the required answer options. Tapping typically results in a visible response. There are often more than one question on the screen; be sure to answer all questions. Once all answers have been provided, a Check Answer button will be visible. If you are confident of your answer, then tap on this button. Your answer will be evaluated and your Progress Report will be updated. If you wish to continue making edits to your answers, then continue tapping on the answer hot spots.

Your goal in the Concept Builder is to earn "Stars" and to complete one or more activities. Stars are earned when you show success on a particular question. If you miss a question then you will have to answer two similar questions correctly before earning a star. Once you show success on all the questions for a particular activity, you will earn the trophy for that activity.

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