Friction Board Apparatus

For Experiment in friction and its dependence on verious factors. Comprises a wooden friction board about 490 X 75 X 18 mm In size, a long aluminium friction board that fits over the wooden friction board, a wooden slider about 140 X 70 X 18 mm with hook, a plain aluminium slider that fits over wooden slider and an aluminium slider with rubber sheet pasted on one side to provide various combitioins of surfaces for friction experiments.