Question

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

Answer 1

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.

Answer 2

We know that every object having mass have inertia, here also the baggage placed at the roof will have inertia.

Since, if the moving bus suddenly stops, then the inertia of that object will continue its motion and hence, it will fall down.

So, we shall tie it with rope.