1. The problem statement, all variables and given/known data a hyper-intelligent flea jumps over a trunk with radius R lying on the ground assuming the shape of a cylinder. What minimum velocity must it exert to land on the other side , clearing the trunk ? 2. Relevant equations displacement along x-axis = v2/g sin2x where x = angle of projection. 3. The attempt at a solution I assume that the circular cross section of the trunk cuts the parabolic trajectory at its highest point, but this gives me an equation for the y-component of the vector. How do I get the x-component equations ?