## Chapter 11: Collisions

### Study Plan

With the concepts of this chapter we can answer questions such as:

• What is the average force on the front of an automobile during impact? (Example 1, page 341)
• What is force on the head of a dummy during a collision with the windshield or the steering wheel? (Example 2, page 341)
• How do seat belts and air bags protect occupants of an automobile in a crash? (Physics in Practice: Automobile Collisions, page 343)
• How does the stiffness of the front end of an automobile affect the safety of its occupants in a collision? (Checkup 11.1, question 1, page 344)
• In a two-car collision, how are the initial velocities related to the final direction of motion? (Example 7, page 351)

#### Organize

1. Prepare for lecture by reading the assigned sections from Chapter 11 in your textbook or ebook. This will provide an organizing framework for concepts introduced in lecture, and help you take better notes.
2. Take the checkup quiz and work the Checkup questions in your textbook to assess your understanding of basic concepts. Take note of any topics you need to review further.
3. Review the Examples from your textbook. These progress from simple to complex, and provide concrete illustrations of the concepts discussed.
4. Review the Problem Solving Techniques box on Conservation of Energy and Momentum in Collisions from your textbook.

#### Learn

2. Access the Online Concept Tutorials given for this chapter. Tutorials use animation and interactive exercises to help develop your understanding of fundamental topics.
Momentum in Collisions
Sections: 11.1, 11.3
3. Use the FlashCards to test your memory for new key terms and equations.
4. Work the end of chapter Problems and Review Problems assigned by your instructor. If your instructor has assigned SmartWork online homework, login from the right navigation pane.

#### Connect

1. Throughout the text Physics in Practice boxes explore real-world applications of core concepts in specific detail. In Chapter 11 see:
 Physics in Practice: Automobile Collisions
2. Physics in the News offers additional real-world physics applications, and a daily dose of science-based news.

### Connect

Instructors now have an easy way to collect students’ online quizzes with the Norton Gradebook without flooding their inboxes with e-mails.

Students can track their online quiz scores by setting up their own Student Gradebook.