1. The problem statement, all variables and given/known data A snowball rolls off a roll that has a slope of 30* from the horizontal with a speed of 5.0 m/s. The edge of the roof is 10m above the ground. How far from the house (horizontally) does the snowball strike the ground? 2. Relevant equations I'm using one of the kinematic equations - [tex]s_f=s_i+v_i t+1/2a(t)^2[/tex] 3. The attempt at a solution I know I need solve for both x and y planes. Solving for t on the y-axis gives me 3.016s to the ground. Then plugging that in and using the same equation but solving for [tex]s_f[/tex]...I get the wrong answer. I know the angle of the roof the snowball falls from comes into play, but I don't know how. I thought it had something to do with the original position, but it doesn't. The only thing we've learned about inclined planes is their effect on gravity. Which doesn't apply to this problem. Any pointers on how that roof slope comes into play?