A part of the morning newspaper suddenly falls down on the floor by the wind of the fan .

Question

A part of the morning newspaper suddenly falls down from the table on the floor by the wind of the fan.

Answer 1

Your sentence is grammatically correct.

Here is another way you can say it:

A part of the morning newspaper suddenly fell from the table to the floor due to the wind from the fan.

The wind from the fan caused a part of the morning newspaper to fall from the table to the floor.