Skip to Content Go to sign in Skip to Primary Navigation Skip to Secondary Navigation Skip to Page Navigation Skip to Header Navigation Skip to Footer Navigation Read more about accessability options and our navigation

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.

Return to screen reader navigation
Home Concept Builders Fluids Pascal's Principle Directions

Pascal's Principle - Directions

The Pascal's Principle Concept Builder is quite simple to use. There are three different activities and each activity involves a different task. In the first activity - Paragraph Completion - you are given a paragraph with eight missing words or phrases. You must complete the paragraph. You do so by tapping on the "Tap Me!" buttons above each blank in order to toggle through the answer options for that blank. Once you have filled in each blank, a Check Answer button appears. If you are satisfied with your answers, tap on the Check Answer button. If not, edit your selection by tapping again; then tap the Check Answer button. Your answers will be evaluated and you will be given immediate feedback. If you have incorrect responses, you can make corrections and try again. Once you have accurately completed the paragraph, you will be rewarded the Trophy for the activity (for Task Tracker users only).

In the second activity - The Hydraulic Lift - you are presented with a diagram of a hydraulic lift. The areas of the two pistons are shown in the diagram. The input force on the smaller piston is given. You must determine the output force at piston B. You select your answer by tapping on the Tap Me! field. Tapping toggles through the four to six possible answers and then recycles back through again. Once you have identified your desired answer, tap on the Check Answer button. Your answer will be evaluated and your Progress Report will be updated (for Task Tracker users).

In the third activity - Thinking Proportionally - you are presented with a diagram of a hydraulic lift. The areas of the two pistons are shown in the diagram. Given these areas, you must determine how many times greater (or smaller) that the force on, the pressure at, and the displacement of Piston B is relative to Piston A. There are three Tap Me! fields for the three different questions and answers. Tapping on these fields toggles through the possible answer options. Once you have identified an answer for each of the three questions, a Check Answer button appears. If you are satisfied with your answers, tap on the Check Answer button. If not, edit your selections by tapping again; then tap the Check Answer button. Your answers will be evaluated and your Progress Report will be updated (for Task Tracker users).

Your goal is to answer questions, earn "Stars" (Task Tracker users), 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 activity, you will earn the Trophy for that activity.

Concept Builder Teacher Notes