if two objects of diff. mass are dropped on the moon what is their acceleration speed?

Answer 1

well it depens more on their surface area, because it's aerodynamics makes a big difference. but if they were the exact same object with different densities (thus being a different mass) the following would apply:

the moon's gravitational pull is 1/6th of the earth's.
with the earth's gravitational pull being approx 9.8 m/s^2

9.8/6 = 1.63 m/s^2

Answer 2

Both will accelerate by g. In moon, g is about 1.6 ms-2.