Minimum radius for vertical loop at 1400 km/h with 6.0 g limit

[justinbaker]

A jet pilot takes his aircraft in a vertical loop

(a) If the jet is moving at a speed of 1400 km/h at the lowest point of the loop, determine the minimum radius of the circle so that the centripetal acceleration at the lowest point does not exceed 6.0 g's.


I am having some trouble here. I converted the speed to be 389 m/s. I thought i would use the equation F=m(v^2/r) Then F would equal the normal force minus mg. But this does not seem to work out since we do not know the mass. I am a little confused. So any help would be great. Thanks

 

[vsage]

F = ma.. Fcent = m*Acent

 

[justinbaker]

F = ma.. Fcent = m*Acent

i don't understand what you are saying

 

[vsage]

I'm saying the question is asking for centripetal acceleration which is given by v^2/r. You don't need to sum the forces just the accelerations.