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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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Solve It! (with Fnet = m•a and Vectors) - Directions

Using the Solve It with Fnet = m•a and Vectors Concept Builder is quite simple. There are three difficulty levels and each difficulty level involves the same task - analyzing a physical situation and determine force, mass, and acceleration values. When a value has been determined, it must be entered into the blank. You can do this by tapping on the blank. When you do, a numeric key pad opens; use the key pad to enter your answer. Once you do, you can close the number pad or click on a different blank to enter the numerical answer for that blank. You can check your answers any time by tapping on the Check Answers button. You will receive immediate feedback: correct answers will be marked with a green background and will no longer be editable. Incorrect answers will be marked with a red background and will have to be corrected. There is no limit on how many incorrect responses you can have. Once all answers are correct, you will be provided the next situation (there are two for each difficulty level) or returned to the Main Menu (if you have correctly analyzed both situations). Once you show success at a particular difficulty level, you will earn the trophy for that level.

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