
Return to the first Chapter-Opening Question, page 83, and answer it again now. Try to explain why you may have answered differently the first time.
CHAPTER-OPENING QUESTIONS—Guess now!
A 150-kg football player collides head-on with a 75-kg running back. During the collision, the heavier player exerts a force of magnitude FA on the smaller player. If the smaller player exerts a force FB back on the heavier player, which response is most accurate?
- (a) FB = FA.
- (b) FB < FA.
- (c) FB > FA.
- (d) FB = 0.
- (e) We need more information.

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Chapter 4 Solutions
Physics for Scientists and Engineers with Modern Physics
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