The two masses are each initially 1.80m above the ground,and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system is released?[Hint:First determine the acceleration of the lighte

来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/27 21:04:22
Thetwomassesareeachinitially1.80mabovetheground,andthemasslessfrictionlesspulleyis4.8mabovetheground

The two masses are each initially 1.80m above the ground,and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system is released?[Hint:First determine the acceleration of the lighte
The two masses are each initially 1.80m above the ground,and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system is released?[Hint:First determine the acceleration of the lighter mass and then its velocity at the moment the heavier one hits the ground.This is its "launch" speed.Assume it doesn't hit the pulley.]

The two masses are each initially 1.80m above the ground,and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system is released?[Hint:First determine the acceleration of the lighte
设两个物体一大一小,质量分别为M m
小物体的加速度a=（M-m）g/m
依据机械能守恒：
大物体落地时势能减少：Mg*1.8
小物体此时势能增加：mg*1.8
势能改变的差值=（M-m）g*1.8
势能改变的差值转化为动能
系统动量守恒：设一大一小两个物体,速度分别为V1,V2
mV1=MV2
0.5mV1^2+0.5MV2^2=（M-m）g*1.8
V1=（这个方程是个二元一次方程组,有些复杂,我就不算了）
大物体落地后小物体继续上抛,此时上升的高度h‘=V1^2/2g
综上：小物体可以上升的最大高度：H=1.8+1.8+h’=?
大致就是这样,没有给出最终答案,我也不指望奖励喽^_^

我来翻译一下。两物体均离地1.8米，无阻力滑轮离地4.8米。滑轮释放后，轻的物体能到达的高点是多少？（提示：首先确定轻的物体的加速度和重物到达地面时的速度。这就是轻物的初速度。假设轻物不碰到滑轮）

forces are hidden in the masses 求一句英语汉意as for the two disney worlds,they are usually dismissed as plastic worlds of make-believe for the unsophisticated masses. 一些英语国家概况题目1 What are the two main land masses in New Zealand?2 How many states are there in the United States?Who is the first president of the United States?3 What are the two political parties in the United States?What is the sy Two masses,M and m,are hung over a massless,frictionless pulley as shown below if M>m,what is the downward acceleration of mass M.用字母表示 翻译the masses are all in atomic mass units（物理的） masses of the test membrane The two masses are each initially 1.80m above the ground,and the massless frictionless pulley is 4.8m above the ground.What maximum height does the lighter object reach after the system is released?[Hint:First determine the acceleration of the lighte 如何翻译此句子?It is only the interests of the masses with which we are concerned. Two masses,m1=18.0kg and m2=26.5kg,are connected by a rope that hangs over a pully.The pully is an uniform cylinder of radius 0.260m and mass 7.50kg.Initially,m1 is on the ground and m2 rests 3.00m above the ground.If the system is now released,use c 英语翻译There are two additional factors that influence these moving air masses.One is water vapor that the rising hot air soaks up like a sponge.The other is temperature which,by cooling the hot air,forces it to squeeze out its water vapor in th 一道万有引力计算题求具体数字 计算机里面算不出来 Two 203-kg masses are separated by a distance of 0.96 m.Using Newton's law of gravitation,find the magnitude of the gravitational force exerted by one mass on the other. where are the two women The two balls are same Are the two studens brother? there are two picture and a poster ( ) the wall.（括号里开头字母为e) 英语翻译the masses of three student are in the ratio 4:5:8,if their combined mass is 204kg,find the mass of the heaviest student, there are two computers in the room.对（two)提问 There are two dishes on the table.对two提问.