Problem 1/2 Page 13, Engineering Mechanics - Dynamics, Meriam and Kraige, 4th Edition
Given: Weight of 180 lb
Find: Mass in slugs. Weight in newtons. Mass in kilograms.
W = m g g = 32.2 ft/s2
m = 180 lb / 32.2 ft/s2 = 5.59 lb s2/ft = 5.59 slug
To convert to weight to newtons, use the table in the front of the book.
1 lb = 4.4482 N
W = 180 lb * 4.4482 N/lb = 801 N
W = m g g = 9.81 m/s2
m = 801 N / 9.81 m/s2
m = 81.6 N s2/m = 81.6 kg