An airplane is flying in a horizontal circle at a
speed of 104 m/s. the 76.0 kg pilot does not
want the centripetal acceleration to exceed
6.09 times free-fall acceleration.
find the minimum radius of the plane’s
path. the acceleration due to gravity is 9.81
m/s2

181 m

Explanation:

a = v² / r

6.09 (9.81 m/s²) = (104 m/s)² / r

r = 181 m

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it