A 15 kg rock is dropped from rest on the earth and reaches the ground in 1.75 s. When it is dropped from the same height on Saturn's satellite Enceladus, it reaches the ground in 18.6 s. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of A freely falling coin. Part A What is the acceleration due to gravity on Enceladus? Express your answer with the appropriate units.