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10km
Idle speed at 5mph.
at least 50 feet
The maximum speed of light is its speed in vacuum. That's 299,792,458 meters (186,282 miles) per second.
5 mph
10 mph maximum
Slow, No wake speed
The speed of an object falling from a great height is measured in meters per second per second until it reaches terminal velocity (maximum downward speed).
maximum 10 mph
5
5 mph
It has been proven that the speed of light (about 3 x 108 meters per second) is the maximum speed any object can reach.