(d) None of the above 7. A F-35 stealth fighter jet traveling at & constant speed of 1.20 x 1( mis executes n vertical loop with a radius of 5.(10 x 1( m. Il the mass of the pilot is 70.0 kg, the magnitude of the force exerted un the nikit by the seat at the bottom of the loop is (a) 2.70 x 10'N (b) 5.45 x 10- N (c) 1.89 x 10* N (d) 3.14 x 10 N