本题目来源于试卷: .Gravity..，类别为 美国物理杯赛(Physics Bowl)
[单选题]
15.22 Satellite 1 makes a circular orbit arouno+3+ rup ;vl l ebrc. v12yyaqkaz;z7.d th.6ym.aoguvi ( e Earth with a radius $r_1= R$. Satellite 2 makes a circular orbit around the Earth with a radius $r_2= 2R$. We let v represent the speed of a satellite and a represent the magnitude of a satellite’s acceleration. Which one of the following choices gives the correct relation between the speeds and accelerations of the satellites?
A. $v_2=\frac{1}{\sqrt{2}}v_1,a_2=\frac{1}{4}a_1$
B. $v_2=\frac{1}{2}v_1,a_2=\frac{1}{4}a_1$
C. $v_2=\frac{1}{\sqrt{2}}v_1,a_2=\frac{1}{2}a_1$
D. $v_2=\frac{1}{2}v_1,a_2=\frac{1}{2}a_1$
E. $v_2=v_1,a_2=\frac{1}{2}a_1$
参考答案: A
本题详细解析:
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