U Can: Physics I For Dummies Welcome U Can: Physics I For Dummies. This easy-to-use program allows you to work on hundreds of practice problems in 15 different physics topics.

The Practice Mode tab allows you to choose the topics you want to study, the difficulty level of the questions, and how many questions you want to answer. When you work in Practice Mode, you can view the answer to every problem as you're working.

The Exam Mode tab offers you the same practice problems but in a test format. You don't get to see the answers until you complete the exam.