I'm unsure whether I have done the following problem correctly :) 1. The problem statement, all variables and given/known data A ball is kicked at from the slope as shown. When will the ball hit the slope? http://img90.imageshack.us/img90/8084/slopevi0.th.jpg [Broken] 2. Relevant equations The distance travelled can be expressed in two components: Sx=vt Sy=0.5gt^2 The displacement compontents can also be expressed in terms of tan(a) tan(a)=Sy/Sx 3. The attempt at a solution Substituting we get: Sy=Sx*tan(a) 0.5gt^2=vt*tan(a) 0.5gt=v*tan(a) t=[2v*tan(a)]/g Is this correct?