Friction Slide Apparatus

Model HV-EXP007
It Is very Interesting to study different laws of friction with It.Comprising of a 75x15 cm. wooden board and a frictionlesspulley at one end, a scale pan with the following accessoriesbut without weights. 1. One set of three wooden carriages with different bottomsurface (Wooden, glass and/iron). 2. One carriage with frictionless rollers. 3. One s'etof1hree different surfaces for friction board-aglass plate, a plywood and felt cloth.