Calculating the Initial Speed of an Arrow Shot Horizontally

[catmd13]

Homework Statement

An archer shoots an arrow horizontally at a target 16m away. The arrow is aimed directly at the center of the target, but it hits 56cm lower. What was the initial speed of the arrow?

Homework Equations

im not sure of an equation because it does not have t.

The Attempt at a Solution

I tried V^2=Vo^2+2adeltax

 

[LowlyPion]

Homework Statement

An archer shoots an arrow horizontally at a target 16m away. The arrow is aimed directly at the center of the target, but it hits 56cm lower. What was the initial speed of the arrow?

Homework Equations

im not sure of an equation because it does not have t.

The Attempt at a Solution

I tried V^2=Vo^2+2adeltax

Actually it gives you the time, you just haven't recognized it yet.

Maybe if you figured out how long it takes something to fall 56 cm you'd be good to go?