How Fast Does an Arrow Travel When Shot Horizontally?

[runningirl]

please help! projectile motion question

Homework Statement

You have a friend who is an archer and she wants to know how fast the arrows leave her bow. You have her launch an arrow horizontally, 1.5 m above the ground, and find that the arrow lands 33 m away. What is the initial velocity of the arrow as it leaves the bow?

Homework Equations

y=.5(-9.8)t^2

The Attempt at a Solution

i don't know where to start with this problem. I'm sorry :(

 

[Precursor]

This is a two stage problem. You first have to find the time it takes the arrow to reach the ground vertically. Then you can use that time to calculate the inital velocity of the arrow horizontally.

 

[NamaeKana]

Homework Statement

You have a friend who is an archer and she wants to know how fast the arrows leave her bow. You have her launch an arrow horizontally, 1.5 m above the ground, and find that the arrow lands 33 m away. What is the initial velocity of the arrow as it leaves the bow?

Homework Equations

y=.5(-9.8)t^2

The Attempt at a Solution

i don't know where to start with this problem. I'm sorry :(

Yf=Yo+Voy-.5gt^2
=1.5+0-4.9t^2
1.5/4.9=t^2
t=0.553 seconds
...