Case Studies: Impulse and Force - Directions

Using the Case Studies: Impulse and Force Concept Builder is quite simple. There are two different difficulty levels. The difficulty levels differ only in terms of the number of collisions situations that must be analyzed. The difficulty of the questions are the same in each level; but the Wizard Level contains eight different questions and the Master Level contains only four different questions.

Each question provides a description and a Before-After graphic representing the two different collisions - labeled Case A and Case B. There is one subtle difference between the two cases. You must identify the one variable - velocity change (Delta V), time, or mass - that is different between the two cases. This is done by tappling on the answer field and toggling between the three choices (Delta V, time, and mass). Then you must identify which Case involves the greatest Momentum Change, Impulse and Force. You do this by tapping on the three answer fields and toggling between the three possible answers - A, B, or Both the Same. Once you have selected an answer for all four questions, a Check Answer button appears. Once you are satisfied with your answer, 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 demonstrate success with a particular question. Once you show success on all the Question Groups at a particular difficulty level, you will earn the reward for that level.