Topic: Dynamics and Equilibrium Subtopic: Friction
Why does force of friction oppose motion?
Answer: Friction exists between the surfaces in contact. No real surface is perfectly smooth. Every surface has small pits and bumps. When two rough surfaces come in contact with each other they forms sort of cold welds. These cold welds resist the surfaces to slide over each other. Hence, generating force of friction.
- What is scientific notation?
- Why fragile objects are packed inside polyethylene sheets?
- What is plasma physics?
- What are base quantities?
- Why passengers fall outward on sharp turn?
- How many disciplines physical sciences are divided?
Life on Earth Video