1. The problem statement, all variables and given/known data The input and output pistons of a hydraulic jack are respectively 1 cm and 4 cm in diameter. A lever with a mechanical advantage of 6 is used to apply force to the input piston. How much mass can the jack lift if a force of 180 N is applied to the lever and efficiency is 80%? (answer) 2. Relevant equations 3. The attempt at a solution 1410.6 kg The above question is from a NASA webpage and the answer they provided is 1410.6 kg Can any one please tell me how do solve it ?