How can you determine initial velocity without the given information?

AI Thread Summary
To determine the initial velocity of a ball that must bounce through an opening between 3.1-4.9 feet high, one can use the angle and height provided in the problem. The correct initial velocity is approximately 15-20 ft/s. The discussion highlights the importance of showing working steps to identify where issues may arise in calculations. A user successfully solved the problem after some manipulation of the given data. This emphasizes the value of persistence and collaboration in solving physics problems.
Jason03
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[SOLVED] Initial velocity not given

Hello,
I was looking for a strategy for finding the initial velocity for a problem that gives the angle and height. The problem is: A ball is dropped and rebounds with an intial velocity of what magnitude considering the ball must bounce through an opening that is between 3.1-4.9 feet high.

I tried some manipulation but couldn't get the correct answer...which is around 15-20 ft/s

Thanks
 
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Thanks...I actually figured it out...
 

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