Meteors usually hit the atmosphere doing about 50k mph.............
Some interesting NASA info:
"Scientists estimate that about 48.5 tons (44,000 kilograms) of meteoritic material falls on Earth each day." It's surprising more things don't get hit.
"99.8 percent come from asteroids. 0.2 percent of meteorites are split roughly equally between meteorites from Mars and the Moon. The over 60 known Martian meteorites were blasted off Mars by meteoroid impacts."
Most meteorites, ranging from a few kilograms up to about 8 tons (7,000 kg), will lose all of their cosmic velocity and after a certain point called the retardation point, they begin to accelerate again, under the influence of the Earth’s gravity (9.8 meters per second squared).
The meteorite will then quickly reach its terminal velocity of 200 to 400 miles per hour (90 to 180 meters per second or 320 to 640 km/h).
According to astronomers, when a meteorite hit the Earth’s ground, the maximum theoretical impact speeds are: