- TYPES: Static friction (resists the start of motion), Kinetic friction (resists motion between moving surfaces), Rolling friction (resists rolling objects), Fluid friction (resists objects moving through fluids like air or water).
- FORMS: Dry friction (between solid surfaces), Wet friction (lubricated surfaces), Internal friction (within materials during deformation).
- CAUSES: Surface roughness, intermolecular forces, adhesion between contacting surfaces, and deformation of materials at contact points.
- AFFECTING FACTORS: Surface texture (roughness/smoothness), normal force (weight/pressure), material properties, presence of lubricants, temperature, and speed of motion.
Parent Tip: Review the logic above to help your child master the concept of friction worksheet middle school.
