Question

Can you answer this Riddle?
A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's weight limit is exactly 10,000 pounds, any more will break the bridge. After going about 80 miles down the bridge a small bird lands on the truck. What happens?

Answer 1

nothing.after travelling 80 miles the truck will have surely brunt enough fuel to allow the bird  to land on the truck without breaking the bridge.

Answer 2

some amount of fuel will get empty
bird has some negligible weight
so nothing will happen