- #1

BigJon

- 24

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## Homework Statement

Moon's gravity is 5.31ft/sec^2 An object has the weight of 3.5 lb-f on the moon. What is its lb-m

What is the lb-m and lb-f on Mars with gravity of 12.1 ft/sec^2.

## Homework Equations

w=mg=mg/gc

gc= gravitational constant----> 32lbm*ft/sec^2 for earth

## The Attempt at a Solution

So I understand mass is the same everywhere. Also lb-m and lb-f are the same numerically on earth but not on other planets?

Im just really confused with imperial units because i dont understand when to use or not use the gc.