HELP!!! A question on Kinematics in 2D & 3D? 1. The problem statement, all variables and given/known data A gun is placed at the base of a hill whose slope makes an angle alpha with the horizontal. If the gun is set at an angle theta with the horizontal and has a muzzle velocity Vo, find the distance, measured along the hill, at which the bullet will fall. 3. The attempt at a solution I know that I need to separate this question in to two equations/ two 1D problems (x-axis and y axis) Velocity for x = Vo* cos(Θ-α) - g * t * sin(α) X = Xo + Vo * t * cos(Θ-α) - 0.5 * g * t^2 * sin(α) Velocity for y = Vo* sin(Θ-α) - g * t * cos(α) Y = Yo + Vo * t * sin(Θ-α) - 0.5 * g * t^2 * cos(α) But how can i figure out Vo, Θ, α, Xo, t and Yo Please help me.