A 2.40- bullet embeds itself in a 1.20- block,which is attached to a spring of force constant 770 .
If the maximum compression of the spring is 5.60 ,find the initial speed of the bullet.
Find the time for the bullet-block system to come to rest.
人气:241 ℃ 时间:2020-05-09 07:38:26
解答
都没单位啊……
题目大致意思就是一枚子弹打进一块砖头里,砖头放在一个喷泉上,喷泉提供770的恒力,喷泉的最大压缩为5.6,计算子弹的初始速度,以及系统恢复静止的时间
题目就这样,没单位的话没法算……
推荐
- 一道英文物理题目(英文其实很简单).求高手解答~~~~~~~~~~~~~
- 电动自己车电动骑行时,蓄电池对车上电动机供电,电动机为车提供动力.现有一辆电动自行车,沿着水平的道路匀速行驶,在0.5h内,电动行驶了9km,此时车上工作电压为32V,工作电流为4A.
- a car of mass 1500kg is moving up a straigt road,which is inclined at an angle *to the hrizontal,where sin*=1/14,the res
- Two vectors have equal magnitude,and their scalar product is one-third the square of their magnitud
- An object with an initial velocity of 4m/s moves along a straight axis uder constant acceleration.Three seconds later ,i
- 得到了两个直径和一个周长 怎样算圆面积
- 证明y=xsinx1/x为当x0时的无穷小
- Sie sind immer noch außen vor.是什么意思?
猜你喜欢