How can you determine initial velocity without the given information?

[Jason03]

[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

 

[Hootenanny]

Hi Jason and welcome to PF,

What did you try? Could you post your working?

P.S. For future reference we have https://www.physicsforums.com/forumdisplay.php?f=152" for textbook questions.

 

[Jason03]

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