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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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Work - Directions

Using the Work Concept Builder is quite simple. There are three different activities that can be completed, each requiring an understanding of some aspect of the concept of work. In Activity 1, a situation is described and you must identify whether the situation involves the doing of positive work, negative work, or no work at all. You identify the answer by tapping on one of the three buttons. Your chosen answer is highlighted in yellow. Once you have selected an answer option, a Check Answer button appears. Once you are satisfied with your answer, tap on the Check Answer button. Your answers will be evaluated and your Progress Report will be updated.

In Activity 2, a situation involving work is described. You must determine what force is doing the work. You do so by tapping on one of four descriptions of a force (or on the corresponding radio button to the left of the choice). Your selected answer can be identified by the presence of red text. You will also have to identify whether the total mechanical energy of the object increases or decreases or remains the same as the result of this work. You can identify the answer by tapping on one of the three buttons. Your chosen answers are highlighted in yellow. Once you have answered both questions, a Check Answers button appears. Once you are satisfied with your answer, tap on the Check Answers button. Your answers will be evaluated and your Progress Report will be updated.

In Activity 3, a situation involving work is described. You must determine the energy transformation that occurs as the result of this work. You will be presented with five options. You can select an answer option by tapping on the option or on the radio button to the left of the options. Your selected answer option is identified by red text. If you change your mind, just tap on a different option. Once you have selected an answer option, a Check Answer button appears. Once you are satisfied with your answer, tap on the Check Answer button. Your answers will be evaluated and your Progress Report will be updated.

Your goal is to earn "Stars" and to complete one or more of the activities. Stars are earned when you show success on a particular question. Once you show success on all the questions of a particular activity, you will earn the Trophy for that activity.

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