What is more useful when it is broken?

Solve the puzzle by telling what does below picture means.

What can go through glass without breaking it?

What 5-letter word typed in all capital letters can be read the same upside down?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you move 2 matchsticks to form four equal sized squares.

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

What two things can you never eat for breakfast?