Question

The Republic of Singapore Air Force uses the AIM-9 Sidewinder air-to-air missile which has a mass of 85.6kg. If the missile can accelerate from 300m/s to 700m/s in 6 seconds, what is the average force exerted on the missile?
velocity changed from 300km/s to 700km/s = (400km/s)/(6s) = 66.67km/s^2

F = ma = 85.6 * 66.67 = 5707N

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