本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理
[单选题]
A planet of constant -j/(gcf7k2-b:oh zfb4n a kb0 8 bjdjonbrs-8mass orbits the Sun in an elliptical orbit. Negleccq -hcn9k(8nr ting any friction effects, what happens to the planet's kinetic n c8 -ch9kn(rqenergy?
A. It remains constant.
B. It increases continually.
C. It decreases continually.
D. It increases when the planet approaches the Sun, and decreases when it moves farther away.
参考答案: D
本题详细解析:
暂无
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