Mass is constant across all gravitational fields (and anywhere there isn&#x27;t) for any given object.<p>People interchangeably use lbs &lt;-&gt; kg but the actual equivalence is lbs &lt;-&gt; newton (N). The difference doesn&#x27;t matter in the average person&#x27;s life since we&#x27;re all down here where gravity is homogeneous enough for most applications and people.