About: http://webisa.webdatacommons.org/382082916

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 the question is an abstract one and we do not consider cars but a ball or a rollercoaster, the answer is simple: the flatter the road the worst the performance, as you can see in this video.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com