Free-Body Diagrams for Inclined Planes - Directions

Using the Free-Body Diagrams for Inclined Planes Concept Builder is quite simple. You will be presented with a verbal description of a physical situation for which you must construct a free-body diagram. You will need to read the description carefully so that you can identify the forces - direction and type - that act upon the object. There are twelve force directions to choose from, each represented by an arrow. Tap on an arrow to add a force to the free-body diagram. Tapping a second time removes the force from the diagram. You must also identify the type of each force you add to the free-body diagram. A number will be listed next to the arrows you've added. For each numbered arrow, indicate the corresponding type in the fields below the free-fody diagram. For any selected force, the field will read Tap Me. Tapping on these fields will toggle (and re-toggle) through the five options for force types - gravity, normal, tension, friction, and applied. You can read about the definitions of the force types by clicking on the Question Mark icon to the left of the free-body diagram. If you remove a force from the free-body diagram, all numbered arrows and force types will be shifted accordingly. As long as you have at least one force arrow on the free-body diagram and as long as every force arrow you have is accompanied by the name of a force type, a Check Answer button will be displayed. If you are satisfied with your answers, 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 levels of difficulty. Stars are earned when you show success on a particular situation. Once you show success on all the graphs at a particular difficulty level, you will earn the trophy for that level.