• Support PF! Buy your school textbooks, materials and every day products Here!

Weight vs Mass On Moon and Mars Imperial Units

  • Thread starter BigJon
  • Start date
  • Tags
    mars
  • #1
24
0

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.
 

Answers and Replies

  • #2
6,054
390
## 1 \ \text{lbf} = 32.174 \ \frac {\text{ft} \cdot \text{lbm}} {\text{s}^2} ##.
 

Related Threads on Weight vs Mass On Moon and Mars Imperial Units

  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
2
Views
18K
  • Last Post
Replies
2
Views
979
Replies
6
Views
2K
Replies
1
Views
12K
  • Last Post
Replies
6
Views
5K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
9
Views
12K
  • Last Post
Replies
5
Views
24K
  • Last Post
Replies
3
Views
5K
Top