A fly ball just clears a 10.0 meter fence on the way down at a 45 degree angle, and strikes the ground 8.0 meters beyond the fence. Calculate the speed of the ball when it left his bat (at ground level).
since it lands at ground level dy=0
a=9.81m/s2 since it is the only acceleration acting on a projectile.
The Attempt at a Solution
Ok so ive been all over the place with this question and i have no idea how to solve it. There is no mass so i cannot use any type of energy formula, no time which means i will at some point have to find it, no velocities to start off with, and no overall range or dx distance.
If i had the dx distance then i would be able to solve it since i would have 3 of 4 necessary info for the dy=vit+1/2at2 equation, but with out it im lost.