[填空题]
Calculate the centripetal accelev* 5m lhvq) n08b7qvosr t/;s-kquq(-tw udc5ur 7kep: ation of the Earth in its orbit around the Sun, and the net force exerted on the Earth. What exerts this force on t7:c/k-5 sdqtp w-qukrte u;(uhe Earth? Assume that the Earth's orbit is a circle of radius 1.50$ \times 10^{11} \mathrm{~m}$ . [Hint: see the Tables inside the front cover of this book.] $\times10^{22}$
