本题目来源于试卷: Overweight and underweight，类别为 美国物理杯赛(Physics Bowl)
[单选题]
06.16: A scientist i pu0j1jgkr;mx as1.3dg73sgbn5 +x(uy:mq;c5l o zlpn,so;bc*ptvnnz: t:p 2 the International Space Station experiences "weightlessness" becausm n c:+n:oul,x:z( oqts5b ;;y5n2c ztp lvp*pe
A. there is no gravitational force from the Earth acting on her.
B. the gravitational pull of the Moon has canceled the pull of the Earth on her
C. she is in free fall along with the Space Station and its contents.
D. at an orbit of 200 miles above the Earth, the gravitational force of the Earth on her is 2% less than on its surface.
E. in space she has no mass.
参考答案: C
本题详细解析:
暂无
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