Center of Mass Roller-and-Ramp Demonstrator, 17" Microscopy_Microscopy Equipment &Supplies exposing the rotating coil and

exposing the rotating coil and field magnet for direct observation as students supply 4-9V to drive the rotation

supplied in a plastic storage case

Sturdy wooden pulley simple-machine model with multiple pulleys mounted in series and parallel

designed to receive real images projected by lenses and concave mirrors during focal-length and magnification experiments on the optical bench

Quartz-driven digital stopwatch with 1/100th second precision and a built-in alarm

Center of Mass Roller-and-Ramp Demonstrator, 17" Microscopy_Microscopy Equipment &Supplies exposing the rotating coil andClear coated wooden A ramp at 17 inches long paired with a double ended cone roller that appears to travel uphill while its center of mass actually descends along the diverging rails.