[填空题]
A jet pilot takes hi,vtmap,j.9q ugo ro1x r./lr .s 2 ct2 dew5y;-hc5k eicaircraft in a vertical loop (Fig. 5–43).
(a) If the jet is moving at a speed of 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. $\times 10^3$
(b) Calculate the 78-kg pilot’s effective weight (the force with which the seat pushes up on him) at the bottom of the circle $\times 10^3$
(c) at the top of the circle (assume the same speed).
$\times 10^3$
