A group of engineers has landed on the moon, and they wish to determine the mass of some rocks. They have a spring scale calibrated to read pounds mass at a location where the acceleration of gravity is 32.l86 (ft)(s)-2 One of the moon rocks gives a reading of 18.76 on this scale. What is its mass? What is its weight on the moon? Take g (moon) = 5.32(ft)(s)-2.