Ncert Exercises & Solutions

Q. 19 A person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing a seat belt, he falls forward and hits his head against the steering wheel. Why?

Hint: Apply the law of inertia.

Step 1: Explanation.

When a person driving a car suddenly applies the brakes, the lower part of the body slows down with the car while the upper part of the body continues to move forward due to the inertia of motion.

If the driver is not wearing a seat belt, then he falls forward and his head hits against the steering wheel.

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