Rain is a phenomenon that can be observed daily. Do you know how fast the rain pours when it falls to Earth.
The Weather Guys site reveals that the speed of the rain water depends on the size of the raindrop. Gravity also pulls things down.
As the object falls, the rainwater experiences a friction barrier that defy the downward force of gravity. When gravity and friction friction are balanced, rainwater has a falling equilibrium velocity known as the 'terminal velocity of objects'.
Terminal speed depends on the size, shape and mass of rain drops and air density. As it turns out, rainwater is not what cartoonists portray, where it resembles a pear.
As raindrops drop, they become shaped like hamburgers by the tensile strength of the air they pass through. Rain drops of at least 0.5 millimeters (or 0.02 inches).
You will not find raindrops bigger than about a quarter of an inch in diameter. Larger than that, the fall will break into smaller drops due to air resistance.
Terminal speed of cloud droplets, which are usually about 10 microns in a radius or 0.0004 inches, approximately 1 centimeter per second or approximately 0.02 miles per hour. While bigger raindrops, about a quarter of an inch or about the size of a house fly, have a speed falling approximately 10 meters per second or about 20 mph.
Such speed can cause soil compaction and erosion by its impact strength. The rain drops have different sizes, and the smaller raindrops drove about 2 mph.