What is the speed differential affecting separation per minute for 75 knots?

The correct answer for the speed differential affecting separation per minute for 75 knots is 1.25. This calculation is based on the principle that for every knot of speed, an aircraft covers one nautical mile in one hour. When determining the separation needed for air traffic, we take into account how fast the aircraft is moving.

At a speed of 75 knots, the aircraft will travel 75 nautical miles in one hour, which breaks down to 1.25 nautical miles per minute (since 75 nautical miles divided by 60 minutes equals 1.25 nautical miles per minute). This means that each minute, the aircraft is moving 1.25 nautical miles, which directly correlates to the speed differential used for maintaining proper separation from other aircraft.

Understanding this speed differential is crucial in air traffic control to ensure safe distances are maintained, allowing for effective law of motion calculations and risk management in busy airspace.