Two balls are thrown with equal speeds from the top of a cliff of height h. One ball is thrown at an angle of alpha above the horizontal. The other ball is thrown at an angle of beta below the horizontal. Show that each ball strikes the ground with the same speed, and find that speed in terms of h and the initial speed. (Ignore any effects due to air resistance.)
The Attempt at a Solution
I have tried all different ways but I have no idea what is correct. I have equations (well, examples really) for when something is thrown above a horizontal, but not below it.
I have a ridiculously complicated answer and I feel like this should have a simpler answer.
Can anyone offer any help?? a point in the right direction?