1. The problem statement, all variables and given/known data A 55kg mass is tied to a massless rope wrapped around a solid cylindrical drum. The drum is mounted on a frictionless horizontal axle. When the mass is released, it falls with acceleration 1.0m/s^2 . Find the tension in the rope. my answer : 484N the way I got is by doing this : 55(9.8-1.0). I did this because my friend told me this but am confused on why I have to subtract g from acceleration. Please explain in details.