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]
00.25: The net force on a rocke3p 3-jl2 lz nl;qk9,ma5 jh i*cms:xuot with a weight w0wrcwb26i/4qrbr t9 of 15000 newtons is 24000 newtons. About hb w9r6b0/ itcwr2rqw4ow much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s near the surface of the Earth at takeoff?
A. 62 seconds
B. 678seconds
C. 1.5 seconds
D. 3.8 seconds
E. 15 seconds
参考答案: C
本题详细解析:
暂无
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