题目

求解英文物理题（关于运动学）
A model rocket is launched straight upward
with an initial speed of 51.9 m/s.It acceler-
ates with a constant upward acceleration of
1.58 m/s2
until its engines stop at an altitude
of 150 m.
1.What is the maximum height reached by
the rocket?The acceleration of gravity is
9.81 m/s2.
Answer in units of m.
2.When does the rocket reach maximumheight?
Answer in units of s.
3.How long is the rocket in the air?
Answer in units of s.

提问时间：2021-03-18

答案

我用中文答,可以吧!
v2-v'2=2as
v'2=3167.61
0.5mv'2=mgh
h=161.5
161.5+150=311.5
最大高度为311.5 m
这是第一问的答案
后面两位会做但数太麻烦了,sorry 啊
不明白老外为啥那么爱算数啊