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 rocketoby5l 56qer9w with a weight of 15000 newt9n whphc w:+mdg 5 5iy/aa*0ndons is 24000 newtons. About how much time is needed to increase the rocket ’ speed from 12 m/s to 36 m/s c+dhwyiad5w5png*a /9 0h:nm 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
| 
