After comparing the students' machines Lynn uses Britannica's videodisc Simple Machines and Motion to visually present the concept of an inclined plane and how it helps people do work.
(Lynn; uses; Britannica's videodisc Simple Machines and Motion; to visually present the concept of an inclined plane and how it helps people do work; T:After comparing the students' machines)
Lynn
uses
Britannica's videodisc Simple Machines and Motion to visually present the concept of an inclined plane and how it helps people do work T:After comparing the students' machines