# Homework Help: Arrow initial velocity

1. Sep 11, 2010

### swatmedic05

You shoot an arrow into the air. Two seconds later (2.00 ) the arrow has gone straight upward to a height of 25.0 above its launch point
What is the initial velocity or the formula I would use to find

2. Sep 11, 2010

### LTU83

Are you looking for max velocity? Initial velocity at what point? Before you shot it would be zero. At max height it would also be zero.

3. Sep 11, 2010

### swatmedic05

the right answer is 22.3 but i dont know how the book got that answer

4. Sep 11, 2010

### LTU83

can you post the entire question.

5. Sep 11, 2010

### swatmedic05

That is the entire question: My homework is on masteringphysics.com

6. Sep 11, 2010

### LTU83

There is not enough information to find the answer.

7. Sep 11, 2010

### LTU83

I apologize I think I just figured it out. Here is the formula
velocity & displacement:
v^2=initial velocity+2(-9.8m/s^2)(25m) but your initial velocity should be zero so are you sure that that is what the question is asking for.