Why will the ruler break if the ruler is over lapping a table and the half is covered by a newspaper and the other end will be hit why did the ruler break?

the ruler broke because air pressure was pushing down on the ruler and was on top of it causing the ruler to break instead of the newspaper the ruler broke because air pressure was pushing down on the ruler and was on top of it causing the ruler to break instead of the newspaper the ruler broke because air pressure was pushing down on the ruler and was on top of it causing the ruler to break instead of the newspaper the ruler broke because air pressure was pushing down on the ruler and was on top of it causing the ruler to break instead of the newspaper