page60 Published March 4, 2018 at 1024 × 768 in 2/26 – 3/2/18 (Newton’s 2nd; FBDs intro) PhySP18SS5.3.27 5.8.4 Although each object only has one mass, there are sometimes two different interpretations of that mass. One is the resistance the object has to a change in the velocity of the object in any direction.