About: http://webisa.webdatacommons.org/186480307

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	So for the forces (and the quantities they depend on, i.e. the distance r and the velocity v) it makes no difference where you put the center of your picture.
http://www.w3.org/ns/prov#wasQuotedFrom	field-theory.org