1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution Here are my attempt. The top is when i tried using cylindrical coordinates. Instead of using dA=(cosθ i +sinθj)rdzdθ I used (cosθ i +sinθk)rdydθ since the cylinder is going along the y axis rather than z. The bottom is when i tried using dA=(-fx i - fy +k)dx dy The oddly shaped cylinder is what's throwing me off.