Question

Why don't the luggage kept on the roof of a bus be tied with a rope

Answer 1

Answer:

because both have same velocity

Answer 2

Answer:

1. The luggage kept on the roof will be in the motion when the bus starts moving.
2. But when brakes are applied the bus stops and comes to rest.
3. Due to inertia the luggage will be still in motion and may fall down to the ground and may be damaged.