Question

why is it advised to tie any luggage kept on the roof of a bus with a rope? Answer in simple language

Answer 1

It is advised to tieany luggage kept on the roof of a bus with rope so that while the bus suddenly starts the luggage wouldn't fall down and even when the bus suddenly stops the luggage wouldn't fall . In both the cases the rope is tied to overcome the inertia of motion or inertia of rest . Due to inertia when the bus stops or moves it leads to the fall of the luggage.
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Answer 2

When the bus stops suddenly, the luggage on the roof top will fall forward due to inertia of motion. Similarly when the bus starts the luggage will fall backwards due to inertia of rest. To avoid this, any luggage kept on the roof of a bus is tied with a rope.

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