About: http://webisa.webdatacommons.org/268956688

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	And they offer first hand experiences with pendulums, ramps, and levers, not to mention forces such as gravity and friction.
http://www.w3.org/ns/prov#wasQuotedFrom	pbs.org