Atmospheric pressur
Atmospheric pressure (or air Pressure)
is caused by gravity pulling air towards the Earth. it is defined as the force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of air above that surface in the atmosphere of Earth. At sea level,a column of air one square centimetre (1cm2)in area exerts a pressure equal to 1 kilogram or 1kilogram/cm2.
Air pressure is pushing in all directions. down no us,from the sides and even from below