Chapter 8

NCERT
Class 9
Science
Solutions
4. Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?

Question:

Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?

Answer:

A passenger sitting in a moving bus, U is moving with a same speed in the direction of the bus, But only the lower part of the passenger remains in contact with the bus and the upper part remains free. When the bus stops suddenly, the free upper part of the passenger falls forward. The same situation happens when the bus stops. Suddenly. But this time passenger falls backward, not forward. This situation is due to the principles of inertia and rest.

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