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Chapter 4: Q16. (page 99)

Sometimes, a whiplash results from an automobile accident when the victim鈥檚 car is struck violently from the rear. Explain why the head of the victim seems to be thrown backward in this situation. Is it really?

Short Answer

Expert verified

The head of the victim seems to be thrown backwards because of Newton鈥檚 third law of motion.

Step by step solution

01

Step 1. Meaning of whiplash

Whiplash may be defined as the common injury that happens when the muscles in the neck suffer a strain due to rapid forward and backward movement of the head and neck.

02

Step 2. Application of Newton’s third law

In a whiplash situation, the car is violently pushed forward. As the victim's back is against the seat, their back moves forward with the car. However, the head has no direct force acting on it, and so, it lags behind.

The neck muscles eventually pull the head forward and cause the whiplash. Use the car's headrest to avoid this. In reality, the person's head tends to remain at rest while the car and the victim's torso are pushed forward.

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