About: http://webisa.webdatacommons.org/371731640

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	External forces are those acting outside the body such as gravity and friction.
http://www.w3.org/ns/prov#wasQuotedFrom	coachr.org