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Why is it advised to tie any luggage kept on the roof of a bus... - Science
Question
Why is it advised to tie any luggage kept on the roof of a bus with a rope?
Answer
This is advised to prevent the luggage from falling due to inertia.
When the bus starts suddenly, the luggage tends to fall backward due to inertia of rest.
When the bus stops suddenly, the luggage tends to fall forward due to inertia of motion.
When the bus takes a sharp turn, the luggage tends to fall sideways due to inertia of direction.
Tying the luggage with a rope secures it against these forces.