A stone is dropped from a 75m high building.When this stone has dropped 15m,a second stone is been dropped with an initial velocity such as two stone is been dropped with hit the ground at the same time.So what was the initial velocity of the second

A stone is dropped from a 75m high building.When this stone has dropped 15m,a second stone is been dropped with an initial velocity such as two stone is been dropped with hit the ground at the same time.So what was the initial velocity of the second assume that g=10m/s2 and that there is no air resistance.Complete the velocity-time diagram and calculate the distance traveled using the area method.a) 5s after a stone is dropped from rest.b) 5s after a stone is thrown downwards at a velocity of 20 三道物理题.关于加速度自由落体那些的,A falling stone takes 0.28s to travel past a window 2.2m tall.From what height above the top of the window did the stone fall?A rock is dropped from a sea cliff(悬崖）,and the sound of it striki This Heart Is A Stone 歌词 stone is a hard material.找动词 on the river there is ( )bridge.A:an old stone fine B:a stone old fine C:an old fine stone D:a fine old stone This is a stone bridge.同义句The bridge ______ _______ _______ stone. 英语翻译There is a limestone spire in Dovedale called llam Rock that erupts from the ground like the tooth of some massive prehistoric monster.The entire route was severely overhanging to the extent that if you dropped a stone from the top ,it wo Failure is but a stepping stone to success.翻译 请问Our school is a stone's throw 如何翻译 our school is( )buildingA.a nice old stoneB.a nice stone oldC.a stone old niceD.an old nice stone strong a stone’s throw away是不是 a stone is throw away我是想知道's应该是什么？是has？ Under the stone,there is a stone-fish Under the stone,there is a stone-fish不要告诉我是石头底下有个石头鱼.这里面有没有什么特殊含义呀 dropped dropped under the stone there is a stone fish谁能给个比较通俗的翻译?有故事么? 英语选择题The little girl ___ her cup a moment ago,but luckily it wasn`t brokjen.A dropped B is dropping C had dropped D was dropping 急 Change a stone