Equip your entire physical science class with these sturdy yet inexpensive inclined planes. The Inclined Plane Classroom Set includes inclined planes, end pulleys, string and support rods-enough for eight groups of students. Mechanical Advantage with an Inclined Plane laboratory instructions give students hands-on experience conducting experiments to learn the benefits of an inclined plane, commonly referred to as a ramp. Inclined planes are made of durable wood, have a smooth finish, and measure 5" x 19". Hall's carriages, support stands and clamps, and spring scales or slotted weight sets are required for this laboratory, but are not included.