本题目来源于试卷: Motion with air resistance，类别为 美国物理杯赛(Physics Bowl)
[单选题]
05.14: An astronaut on the Mo 4yaww +mnxd ;*rt(ym9on simultaneously drops a feather and wrvz:dklfkbx 8 *j-*0 a hammer. The fact thar0lxw v*zb8:k fk-*jdt they
reach the surface at the same instant shows that
A. no gravity forces act on a body in a vacuum.
B. the acceleration due to gravity on the Moon is less than the acceleration due to gravity on the Earth.
C. the gravitational force from the Moon on heavier objects (the hammer) is equal to the gravitational force on lighter objects (the feather).
D. a hammer and feather have less mass on the Moon than on Earth.
E. in the absence of air resistance all bodies at a given location fall with the same acceleration.
参考答案: E
本题详细解析:
暂无
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