本题目来源于试卷: Physics Unit5: Circular Motion & Gravitation，类别为 通用国际物理
[单选题]
At a distance of 14000 km from s p gutgtn0 .r3 sdg,/54yblui)ome pl4b* fwr0gf9 cv egje0h 8fw+,banet's center, the acceleration of gravity isf r w0bef9cg8 ,0vebghw 4*jf+ $32 \; m/s^2$. What is the acceleration of gravity at a point 28000 km from the planet's center?
A. $8.0 \; m/s^2$
B. $16 \; m/s^2$
C. $128 \; m/s^2$
D. cannot be determined from the information given
参考答案: A
本题详细解析:
暂无
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