a cannon is launched @ 30deg angle above the horizontal with an unknown velocity the projectile is observed to hit a vertical wall at a horizontal distance of 100.0m and it hits a height of 15.0m above the ground, find the initial velocity.(adsbygoogle = window.adsbygoogle || []).push({});

the following is what i did to solve it, but the fact that i didnt even use the 30deg at all throughout the solution has me second guessing my solution, so i was wondering if anyone could point out what i did wrong

any help is appreciated

thanks

http://desi.thriceshy.com/images/1440scan.jpg [Broken]

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# Homework Help: Projectile motion help

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