NCERT · Class 8 · Science · FrictionWhat causes friction between two surfaces in contact?
Step-by-Step Solution
Friction is caused by the irregularities on the two surfaces in contact. Even surfaces that appear very smooth have a large number of minute irregularities on them. When two surfaces are pressed together, these irregularities interlock with one another, causing opposition to motion.
Detailed Options Breakdown
Option : Smoothness of surfaces
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Friction.
Option 1: Irregularities on the surfaces (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Chemical reactions
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Friction.
Option 3: Magnetic force
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Friction.
💡 Study Guide: This question tests core syllabus concepts from Friction. For formulas, key summaries, and mock exam reference guides, read the full Friction Revision Notes.