- TYPES: Static friction (resists the start of motion), Kinetic friction (resists motion between moving surfaces), Rolling friction (resists rolling objects), Fluid friction (resists movement through liquids or gases).
- FORMS: Dry friction (between solid surfaces), Wet friction (lubricated surfaces), Internal friction (within materials during deformation).
- CAUSES: Surface roughness (microscopic bumps interlock), Adhesion (molecular attraction between surfaces), Deformation (surfaces compress and resist motion).
- AFFECTING FACTORS: Surface texture (rougher surfaces increase friction), Normal force (greater pressure increases friction), Material type (different materials have different coefficients), Lubrication (reduces friction by separating surfaces).
Parent Tip: Review the logic above to help your child master the concept of friction worksheet.
