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>A particpant who teaches 9th grade science has questioned the
>correct answers to the pretest for item numbers: 2, 8, and 9.
>He says item # 2.'s answer should be d. - that none of the above are correct;
># 8.'s answer should be a. - that the windshield exerts a greater
>force on the bug than the bug exerts on the windshield, and that #
>9.'s answer should be that the small car exerts a greater force on
>the truck than the truck exerts on the car.
>Please explain the correct answer choices.
>Thanks, Mary Tweedy
Many thanks for your query. The reason that the series was produced
was to help further our audience's understanding of this most
difficult topic area. The answers, as they stand, are correct.
The answers to most of these pre-test questions are explored directly
in the video, print or web materials so I hope that by the time you
and your fellow workshop participants have completed the series that
you have gained a broader confidence in this topic.
How did you do on the post-workshop questionnaire?
Clive A. Grainger
Science in Focus: Force & Motion
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