Question

Why is it advised to tie any luggage kept on the roof of a bus with a rope?

NCERT Class IX
Sciences - Main Course Book

Chapter 9. Force and Laws of Motion

Answer 1

When the bus accelerates and moves forward, it acquires a state of motion. However, the luggage kept on the roof, owing to its inertia, tends to remain in its state of rest. Hence, with the forward movement of the bus, the luggage tends to remain at its original position and ultimately falls from the roof of the bus. To avoid this, it is advised to tie any luggage kept on the roof of a bus with a rope.

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Answer 2

A luggage is usually tied with a rope on the roof of buses. When a moving bus suddenly stops, the luggage on its roof tends to continue in the state of motion due to inertia of motion. ... Thus, to avoid the falling of the luggage, it is tied with a rope on the roof of a bus