Demonstrates the relationship between roughness and friction: This instrument clearly shows how the roughness of the surfaces in contact influences the magnitude of sliding friction. Indicates independence from relative motion: The demonstrator reinforces the principle that the size of sliding friction remains unaffected by the relative motion between the two objects. Illustrates static friction behavior: When two objects are in contact and at risk of moving, static friction is present, with its magnitude increasing alongside external force applied. Compares static and sliding friction: This instrument effectively proves that the maximum force of static friction surpasses the force of sliding friction, enhancing the understanding of these critical concepts. Service: If you have any questions, please feel to contact us and we will reply within 24 hours!