Economy Atwood Machine, 8.25" Lab Equipment and Supplies_Racks & Stands Double-parallel plastic pulley with two

Double-parallel plastic pulley with two 50mm wheels in a steel frame and end hooks

Fine 40-60 mesh iron filings in a 100-gram sprinkle bottle

Built from two counter-rotating foil-sectored plates with a belt drive and a pair of Leyden-jar condensers

measuring period under different loads to isolate mass from weight

showing the hexagonal bonding within each layer and the weak bonding between layers

Economy Atwood Machine, 8.25" Lab Equipment and Supplies_Racks & Stands Double-parallel plastic pulley with twoEconomy 8. 25 inch Atwood machine with two 2 inch blue plastic pulleys on an aluminum rod, using metal bearings to minimize friction in uniform acceleration and Newton's second law work.