本题目来源于试卷: Newton’s law of motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
07.18: In which one of the foll52v1l+r u uld )+anzqyowij1 wc1 s;wckl7skv3:qng situations is the net force constantly zero on the obl cw17;3 skwc1 :qjvksject?
A. A mass attached to a string and swinging like a pendulum.
B. A stone falling freely in a gravitational field.
C. An astronaut floating in the International Space Station.
D. A snowboarder riding down a steep hill.
E. A skydiver who has reached terminal velocity.
参考答案: E
本题详细解析:
暂无
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