About: http://webisa.webdatacommons.org/131207437

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	In reality, however, there is a friction between the mass and the surface, as is shown in Figure 3,
http://www.w3.org/ns/prov#wasQuotedFrom	uwaterloo.ca