# Homework Help: Projectile motion probelem

1. Oct 21, 2008

### afcwestwarrior

1. The problem statement, all variables and given/known data
A pitcher throws a ball at an angle 37 degrees with the horizontal and observes that the ball stays in the air for 2.5s before hitting the ground. Neglecting air friction and the height of the pitcher, find
(a) the initial speed of the ball
(b) maximum height reached by the ball
(c) how fast would the pitcher have to run (at constant speed) to catch his own ball?

2. Relevant equations
v=Vinitial + at
x-xinitial=vinitial (t)+ 1/2 a t^2

basically the kinematic equations

3. The attempt at a solution
Vi=?
Vfinal=0
Ax=0
change in x=?
g=-9.8m/s^2

ok what do i do

2. Oct 21, 2008

### LowlyPion

Start with the Vy. You know how long it takes to go up and then goes down. What does that translate into as far as initial velocity up?

Last edited: Oct 21, 2008
3. Oct 21, 2008

### afcwestwarrior

it's positive

4. Oct 21, 2008

### LowlyPion

and ... ?

5. Oct 21, 2008

### afcwestwarrior

i don't know

6. Oct 21, 2008