Question

When a rain falling downward, the front windscreen of a running car gets wet while the back windscreen may not.why?

Answer 1

SUPPOSE RAIN IS FALLING VERTICALLY DOWNWARD.

WHEN CAR MOVES FORWARD,IT HAS TO ENCOUNTER RAIN. BUT ONLY FRONT WINDSHIELD ENCOUNTERS RAIN BECAUSE REAR WINDSHIELD IS PROTECTED BY FRONT PART.
IF YOU DRIVE CAR IN REVERSE WITH SOME SPEED, REAR WINDSHIELD ALSO WILL GET WET.