# 2D projectile problem

1. Oct 24, 2009

### hiuting

1. The problem statement, all variables and given/known data
A baseball is hit at a height of 1m with an initial velocity of 27 m/s at 32 degrees above the horizontal. A field player is located 50m from the home plate along the line of flight.

(a) If he runs, is there a chance he could catch it? what's the velocity?
Assume his reaction time is 0.5s, and that he would catch it at the initial level. MAIN ISSUE: (i don't know what he means by "initial level". initial level of the pitcher, or field player?)

2. Relevant equations
kinematics equations:
Xf = Xi + ViT + 1/2at^2
Vf^2 = Vi^2 + 2a(delta x)
Vf = Vi + a(delta T)

3. The attempt at a solution
0 = 1 + 14.308T - 4.8T^2
....
T = 2.99s
66.86 = 50 + Vi(2.99s)
...
basically, I got Vi as 7.57m/s instead of 7... maybe it has to do with the "initial position" that i didn't get?

Last edited: Oct 24, 2009
2. Oct 24, 2009

### aeroengineer

Initial level is simply the height from the ground at which the baseball is hit. Don't forget to take into account the fielder's reaction time.

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