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 rocket ncbo3t+a*yx ; ojxyt-c:ws 6:with a weight of 15000 newtons is6wuf4 t rr5 f-hugc19e 24000 newtonsw g-rfu9t6 uhf1e45rc. About how 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
| 
