About: http://webisa.webdatacommons.org/163038431

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	If each of these equations are solved separately, tr and tl are obtained, i.e. the time when the velocity of the respective mass crosses the zero level.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com