About: http://webisa.webdatacommons.org/428271861

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	Closed If you are beginning to teach simple machines to your students, Michael Dahl???s book Pull, Lift, and Lower: A Book About Pulleys, is an easy to understand introduction to the way pulleys work.
http://www.w3.org/ns/prov#wasQuotedFrom	richmond.edu