- TYPES: Static friction (resists the start of motion), Kinetic friction (acts on moving objects), Rolling friction (resists rolling motion), Fluid friction (occurs in liquids and gases).
- 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, deformation of materials under load.
- AFFECTING FACTORS: Surface texture, normal force pressing surfaces together, material properties, temperature, presence of lubricants, relative speed of motion.
Parent Tip: Review the logic above to help your child master the concept of friction worksheet pdf.