Double Long Pulley, 2" and 1.5" Wheels Handle Type_Wood polished with ground edges for

polished with ground edges for image-formation experiments in introductory optics

and leaf-electroscope demonstrations

this handle-fitted bicycle wheel lets students feel torque resistance in a spinning mass

sized as the heaviest gauge in the line for high-current electromagnet windings and resistance-vs-length investigations

Chrome-plated alternate-build 50mm reading magnifier with a 20cm focal length

Double Long Pulley, 2" and 1.5" Wheels Handle Type_Wood polished with ground edges forUnequal wheel pulley with a 2 inch and a 1. 5 inch wheel at 5. 75 inches overall in a metal frame with end hooks, showing how different wheel diameters change mechanical advantage.