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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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Forces and Free-Body Diagrams in Circular Motion - Directions

Using the Forces in Circular Motion Concept Builder is quite simple. You will be presented with a verbal description of an object moving in circles. You will have to think about the situation that is being described and identify the free-body diagram that is consistent with the situation. You can select the free-body diagram by tapping on the diagram section on the right side of the Concept Builder. Tapping allows you to toggle through the six options for answers. Once you'e toggled through all six, you can recycle through the options a second time. The field above the diagram indicates what option you are viewing. Once you have selected your option, stop tapping. Then tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated. Your goal is to earn "Stars" and to complete one or more activities. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular difficulty level, you will earn the reward for level.

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