I only have on try left on A so I would prefer the actually answer and I will re

Question

I only have on try left on A so I would prefer the actually answer and I will rework the problem, preferably like that for all the parts, thanks.

Problem 2.99 A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.16 later. You may ignore air resistance. Part A If the height of the building is 19.6 , what must the initial speed be of the first ball if both are to hit the ground at the same time? = SubmitMy AnswersGive Up One attempt remaining; Try Again Part B Consider the same situation, but now let the initial speed of the first ball be given and treat the height of the building as an unknown. What must the height of the building be for both balls to reach the ground at the same time for = 8.65 . = SubmitMy AnswersGive Up Part C If is greater than some value , a value of does not exist that allows both balls to hit the ground at the same time. Solve for .    =    SubmitMy AnswersGive Up Part D If is less than some value , a value of does not exist that allows both balls to hit the ground at the same time. Solve for .

Explanation / Answer

second ball reaches the ground at

19.6=0.5*g*t1*t1

==>t1=2 s

so total time =1.16+2s

=3.16s

for the first ball 3.16/2=1.58 s it should reach the top most point

hence

v= g*1.58

=15.484 secs

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