Stone A is dropped from the top of tower of height of 40m.at the sametime another stone B is projected from the bottom of the tower with an initial velocity such that the stones collide midway.the initial speed of second stone B is??

Question

anonymous · Answer

the trick on this one is to figure out how long it will take stone A to fall (1/2) of 40m. then take that time, and figure how how much velocity would be needed to launch stone B up to (1/2)40m in the time it takes for stone A to fall half way down ^_^
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