hydraulic problem, need help!!! a hydraulic chamber in which a spring (spring constant = 1456 N/m) is attached to the input piston, and a rock of mass 39.4 kg rests on the output plunger. The piston and plunger are at the same height, and each has a negligible mass. By how much is the spring compressed from its unstrained position? output plunger=65cm^2 input plunger=15cm^2 i have no clue how to get it started, can anyone help!