Providing varieties of Dynamic Trolley, flywheel, kinetic theory model to government and private institutions for scientific research and developments in India. This Dynamic Trolley is an excellent tool to study forces, motion and friction. Dynamic Trolley Made of wood, 300 mm long, metal reinforced ends, three low friction ball bearing wheels, and fitted with spring loaded impulse rod. Rod has three positions to provide different impulses and is triggered by a release pin. Four removable metal legs to enable stacking of Trolleys, mass 0.9 kg approx.