Unit B: Changes in Motion

Lesson 2.6: Designing a Helmet

Firefighters, cyclists, football players, and construction workers have something in common—they are all exposed to hazards that could lead to head injuries and, thus, wear helmets or hard hats for protection. To ensure that helmets and hard hats will provide the necessary protection, their designs must be tested. In this lesson you will apply your knowledge of changes in motion to develop test procedures for a helmet.

  • Read pages 272 to 274 of the textbook. Answer the questions as you encounter them.

  • Carefully work through Example Problem 2.13 on pages 275 and 276 of the textbook. Then, answer Practice questions 23 and 24 on page 277.

    Check your answers with those in the “Practice Answers” in the online course.

In the next investigation, you will have an opportunity to design and test a helmet.

 

  • Read the entire investigation on pages 277 to 279 of the textbook.

If you have access to a supervised laboratory and a partner to help you, do Path 1. If you do not have access to these resources, do Path 2.

  • Follow the directions in the investigation, and answer the questions.

    Note:     Do questions 7 and 8 of “Evaluation” on page 279 only if you know of another group that has completed this investigation.

    Check your answers with those in the “Suggested Answers” in the online course.
  • Use the sample data for this investigation in the “Suggested Answers” in the online course to answer questions 2 to 6 on page 279.

    Check your answers with those in the “Suggested Answers” in the online course.

  • Read “Protecting Your Head” on page 280 of the textbook.

In the next activity, you will do some research to support the following statement:

The use of bicycle helmets results in a significant reduction in head injuries among cyclists.


  • Read the activity on page 280 of the textbook. Follow the directions, and answer the questions.

    Note: If you worked on this activity by yourself, share your findings with a friend or family member.

    Check your answers with those in the “Suggested Answers” in the online course.
 
  • Read “2.6 Summary” on page 280 of the textbook. Then, complete “2.6 Questions” on page 281.

    Check your answers with those in the “Practice Answers” in the online course.

Go to Assignment 2.6: Designing a Helmut.