(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Joe Carter hit a fly ball during the spring training. It just cleared a 10m high vertical fence on the way down at 45 degrees as shown and struck the level ground 8m beyond the fence. Calculate the speed of the ball when it left his bat at ground level (start and end points are the same, ignore air resistance). Answer in m/s.

2. Relevant equations

∆x = vit

5 kinimatics equations for y direction

3. The attempt at a solution

Since air resistance is negligible, and the ball starts and ends at the same level, vi = vf

a = 9.8 m/s down

We can break equation into 2 parts - part 1 before fence and part 2 after

For Part 2

∆dix = 8m

∆diy = 10m

a = 9.8 m/s (down)

vf = vi of part 1

vf = ?

It seems we're missing time and vf, two variables of the equation for part 2, and several variables for part 1. If you guys can help me figure this out that'd be sweet.

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