1. The problem statement, all variables and given/known data My problem looks like this: http://i.imgur.com/3M9wE43.png I need to find the point of impact and the time the body traveled. 2. Relevant equations 3. The attempt at a solution I tried to find the time for 25 meters and with that the vertical velocity and height. Ended up getting: t at 25m = 1.96 s , h=16.83 m vi=-1.03 m/s I tried this: hf=vx*sin37*t = 7.67 m/s*t , it should mean that for every seconds the slope rises 7.66m in height. After that I set up: hf = h + vi*t - 1/2*g*t^2 and got: 7.67*t = 16.83 - 1.03*t - 4.905*t^2 -4.905*t^2 - 8.7*t + 16.83 = 0 4.905*t^2 + 8.7*t - 16.83 = 0 The positive t was 1.17 s Total time = 1.96 s + 1.17 s = 3.13 s Height: h = vi*t - 1/2*g*t^2 h = 18.20 m/s * 3.13 s - 1/2 * 9.81 m/s^2 * (3.13s)^2 h = 8.91 m distance = vx*t distance = 12.75 m/s * 3.13 s = 39.9 m My problem is that the height and distance doesn't match, the tangent of the angle is: height/distance = 8.91/39.9-25=8.91/14.9=0.5979 , with arctg I get around 31 degrees, shouldn't I get 37 degrees here? This is what bothers me. Is the method I used correct? If not, what is the method I should use to solve it?