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A fighter pilot dives her fighter plane toward the ground at maximum supersonic speed of 2170 km/hr. She pulls out of the dive on a vertical circle. What is the maximum radius of the circle, so that her apparent weight is never more than six times her weight?

I have no idea how to approach this. However, I know apparent weight= mg+ma, and a_c= V^2/r

Help needed!

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# Vertical circle, miminum radius

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