Sliding Friction Slide Demonstration Kit for physical science and physics is a demonstration that conclusively shows that frictional forces are independent of the contact area. No other demonstration shows this principle so decisively.
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Finally! A demonstration that conclusively shows that frictional forces are independent of the contact area. The uniquely designed base has a wedge shaved out to provide a continuously changing surface area. As the sled is pulled along the base, the contact area increases or decreases but the frictional forces remain constant. There’s no other demonstration that shows this principle of friction so decisively! Add weights to the sled and show that the frictional forces are proportional only to the normal force acting on the sled. Base and sled are made from hardwood and will last for years. A spring scale is required and available separately. Base dimensions: 16 cm × 100 cm. Sled dimensions: 15 cm × 20 cm.