posted by Eden .
If the jet is moving at a speed of 1800 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 6.4 's
The jet is moving in a verticle loop
You did not give units so I assume 1800 m/s and 6.4 m/s^2
Ac = v^2/r
6.4 = 1800^2/r
r = 1800^2/6.4 in meters if you gave me metric units